[HN Gopher] The Nobel Prize in Chemistry 2021
       ___________________________________________________________________
        
       The Nobel Prize in Chemistry 2021
        
       Author : _Microft
       Score  : 173 points
       Date   : 2021-10-06 09:51 UTC (13 hours ago)
        
 (HTM) web link (www.nobelprize.org)
 (TXT) w3m dump (www.nobelprize.org)
        
       | peyloride wrote:
       | It would be really nice if someone can ELI5 this.
        
       | peyloride wrote:
       | It would be nice if someone can ELI5 this.
        
         | _Microft wrote:
         | Catalysts make reactions go faster and are not consumed during
         | the reaction. There are molecules that are mirror images of one
         | another. It was thought that there were only two types of
         | catalysts that could help with those: enzymes and metal
         | catalysts. The laureates discovered a third type that is easier
         | to work with and outperforms the other methods. It is in wide
         | use now.
         | 
         | (Edit: that turned out to be pretty ELI _5_ actually. _Proceeds
         | to build mirrored molecules from Lego bricks_...)
        
         | Greek0 wrote:
         | Organic synthesis is about making new molecules that haven't
         | existed before. That's important for developing new drugs,
         | improved batteries, better plastics, etc.
         | 
         | Organic molecules are networks of atoms, with both a distinct
         | connectivity pattern, and a specific 3D orientation [1] of the
         | atoms to each other. See e.g. the Wikipedia page of Lipitor[2]
         | a picture of the connectivity pattern.
         | 
         | We build these molecules through chemical reactions. Over time,
         | we have become pretty good at creating the connectivity
         | patterns we want. However, achieving the correct 3D arrangement
         | is still challenging.
         | 
         | List and MacMillan developed new chemical reactions that enable
         | us to get both the connectivity, and the 3D aspect right. Such
         | new methods are frequent Nobel contenders, and won e.g. in 2001
         | with Knowles/Noyori/Sharpless.
         | 
         | As for how these reactions work: it is true that they are
         | catalyst-based and that catalysts speed up reactions, but that
         | perspective is a bit misleading. The key point is that without
         | catalysts, these reactions would not happen at all. So the
         | catalysts List&MacMillan found accelerate some desirable
         | reactions so much that they turn from "practically doesn't
         | happen at all" to "done in an hour".
         | 
         | Congratulations to the outstanding work, and to the Nobel
         | price!
         | 
         | [1]: See https://en.wikipedia.org/wiki/Chirality_(chemistry)
         | for a deeper look [2]:
         | https://en.wikipedia.org/wiki/Atorvastatin [3]: For a deeper
         | look at the chemistry, check out
         | https://www.nobelprize.org/uploads/2021/10/popular-chemistry...
         | and https://www.nobelprize.org/uploads/2021/10/advanced-
         | chemistr... -- also shared by _Microft
        
         | hidden-spyder wrote:
         | @aazaa posted a great reply simplifying it. It's the top
         | comment now.
        
       | amelius wrote:
       | The monetary award corresponding to the Nobel Prize is only
       | 0.0005% of the net worth of Jeff Bezos.
       | 
       | The societal value of Amazon must be huge ...
        
         | hallqv wrote:
         | Would I argue that the societal value of Amazon is actually
         | huge (AUC-wise). Amazon positively impacts all of it's
         | employees, consumers as well as other companies (my company
         | wouldn't exists if AWS hadn't paved the wave for cheap cloud
         | computing).
         | 
         | Anyway, it is certainly a mistake to equate generating
         | socieltal value with financial gains. In many settings there is
         | a strong positive correlation (Amazon IMO), others where it's
         | weak (research) and yet others where it's negative (drug
         | dealing).
        
         | taneq wrote:
         | That's a specious comparison. Nobody awarded Bezos his wealth.
        
         | melling wrote:
         | That's sort of an absurd comparison. Some rich guy 125 years
         | ago...
         | 
         | Anyway, it would be great, however, if society (we!) did value
         | science, research, etc much more.
         | 
         | We could collectively decide to cure cancer(s).
         | 
         | We could collectively decide to create a better material than
         | plastic.
         | 
         | We could collectively decide to create better batteries so
         | renewables become more feasible.
         | 
         | We could collectively develop safer nuclear power...
         | 
         | We could do such much more..
        
           | amelius wrote:
           | > That's sort of an absurd comparison.
           | 
           | Making the comparison would be absurd only if the difference
           | in payoff wasn't so absurd.
        
         | ed_balls wrote:
         | it's a bad idea to compare cash to a number in a computer which
         | estimate share value (taking future cash flow into account)
        
           | joelbluminator wrote:
           | What? Besos can sell his stocks in a few months and turn it
           | into cash. Even if he can't sell everything, let's say he can
           | "only" get 50B in a few months. Eventually he will be able to
           | sell it all if he wants to, there are buyers. Even his ex
           | wife is now one of the richest women in the world so...
        
       | refurb wrote:
       | I haven't been in the lab in a while but David MacMillan was
       | already a legend back then.
       | 
       | His work has become a core innovation in organic chemistry so not
       | surprising he gets a Nobel.
       | 
       | And nice to see the Nobel in Chemistry go to a chemist not a
       | biologist!
        
       | supperburg wrote:
       | Has anyone been to the Nobel ceremony? Is it possible for a
       | layman to go?
        
       | _Microft wrote:
       | There is a section on the page called "Read more about this
       | year's prize" that contains links to a technical and a more
       | accessible description that might easily be missed. If you want
       | to know more, here are they for your convenience.
       | 
       | https://www.nobelprize.org/uploads/2021/10/popular-chemistry...
       | 
       | https://www.nobelprize.org/uploads/2021/10/advanced-chemistr...
        
         | irthomasthomas wrote:
         | Thanks for this. Btw, wtf is up with the banned account reply
         | here? Very weird spam.
        
           | Chris2048 wrote:
           | If you see the accounts previous replies, it's many of the
           | same comment on multiple posts.
           | 
           | Perhaps a lazy attempt at automatic comment-karma farming?
        
         | hikerclimber1 wrote:
         | Everything is subjective. Especially laws.
        
       | ryan93 wrote:
       | Why hasn't Harry gray gotten a Nobel?
        
         | bigbillheck wrote:
         | Which prize would you have taken away from this timeline's
         | winners to give to him instead?
        
           | ryan93 wrote:
           | They only gave two prizes. Third could have gone to him
        
       | sorenso wrote:
       | MacMillian could very well win a second nobel prize for
       | photoredox chemistry somewhere down the line too.
        
         | eganp wrote:
         | Somewhat surprised asymmetric organocatalysis was awarded over
         | asymmetric photocatalysis or photoredox chemistry.
         | Photocatalysis is newer, has more demonstrated use cases, and
         | holds more promise.
        
       | ChemSpider wrote:
       | "Institute for coal research" - German science marketing really
       | leaves a lot to be desired. Never would I have guessed that
       | inside such a lab top science happens.
        
         | DoreenMichele wrote:
         | "Institute for carbon-based life research."
         | 
         | ;)
        
         | geoalchimista wrote:
         | Coal and oil, when not burned for energy, are raw materials for
         | making a lot of essential chemicals.
        
         | refurb wrote:
         | If anything that speaks to the longevity and roots of the
         | institute. I'm guessing it was formed way back.
         | 
         | Indeed, 1912.
         | 
         | https://en.m.wikipedia.org/wiki/Max_Planck_Institute_for_Coa...
         | 
         | Keep in mind coal research was HUGE in organic chemistry. It
         | was a major source of precursors like aromatic hydrocarbons
         | which fed the dye industry which was the origination of organic
         | chemistry (it led to the sulfonamide antibiotics).
         | 
         | Germany absolutely _dominated_ organic chemistry in the late
         | 1800s /early 1900s. It was the place to be to do organic
         | chemistry. Many of the top organic chemistry journals today
         | (Angewandte Chemie) are still topic tier journals for
         | researchers.
         | 
         | That's the history of the institute.
        
         | hellbannedguy wrote:
         | During WW2 Germany needed gasoline.
         | 
         | They did get it out of coal, but it ended up not being cost
         | effective.
        
         | _Microft wrote:
         | The name dates back to 1912 when the institute was founded.
         | Today it is run by Max-Planck-Society, a top-notch research
         | association. The last time someone at a Max Planck institute
         | received a Nobel Prize before this one was ... yesterday.
         | 
         | https://en.wikipedia.org/wiki/Max_Planck_Society#Nobel_Laure...
        
         | Barrin92 wrote:
         | I consider it a feature and not a bug that we don't slap
         | hollywood-esque name onto research. it studies carbon/coal,
         | it's the coal research centre, it does what is says on the
         | label
         | 
         | marketing is how you get 'autopilots' driving over people (a
         | label that also happens to be banned here in advertisement)
        
       | aazaa wrote:
       | > "for the development of asymmetric organocatalysis"
       | 
       | The prize is about artificial catalysts. A catalyst is a
       | substance that speeds up a reaction without being consumed.
       | Another way to speed reactions up is to heat them, but that
       | consumes energy and often leads to by-products that must be
       | removed and disposed of.
       | 
       | The "asymmetric" part has to do with one kind of by-product. Some
       | reactions produce 50% of a by-product that must be separated out
       | and disposed of. This happens because some molecules have 3D
       | structure that's different than its mirror image. Think of the
       | way that certain objects like bottle caps and screws only turn
       | one way to tighten. Molecules can have that property (including
       | many drugs you may have taken), and if the handedness is wrong,
       | in many applications, it's a by-product and/or poison. An
       | asymmetric catalyst can make molecules of one handedness
       | selectively, saving material, money, and energy.
       | 
       | The "organocatalysis" part has to do with what the catalyst is
       | made of. Prior to the awardee's research, catalysts tended to
       | contain metal atoms. A few Nobels have been awarded for catalytic
       | processes that use metals.
       | 
       | So metals are great in principle, but in practice have issues.
       | Some metals are linked to toxicity at trace levels. So when
       | preparing drugs, you need to be very careful about purifying out
       | the metal contaminants. Palladium is an example of a very
       | versatile catalytic metal that causes problems during drug
       | manufacture. Metals can also be quite expensive. Platinum and
       | Rhodium are used in both chemical manufacture and in automobile
       | catalytic converters. The price of Rhodium hit $25,000/oz
       | recently. Not all metals are this expensive, but the cost and
       | availability are often a problem.
       | 
       | The awarded work uses catalysts that don't contain metals.
       | Instead, the catalysts contain the elements carbon, hydrogen,
       | oxygen, nitrogen, and possibly some other non-metal atoms. In
       | other words, these catalysts are made of the same kinds of atoms
       | as life. (Enzymes catalyze biological reactions.) So now there's
       | a link between biological catalysis and artificial catalysis that
       | didn't exist before.
       | 
       | This work solved a number of practical problems, really went
       | against dogma at the time, and opened up an important area of
       | research that intersects with big questions like the origins of
       | life.
        
         | superposeur wrote:
         | Thanks for this clear account. This proves that it is possible
         | (at least occasionally) to describe a chemistry project using
         | ordinary language to a non-chemist.
         | 
         | By contrast, every single chemistry poster session or talk
         | seems instead to consist of inscrutable walls of long technical
         | terms and impossibly convoluted flow charts. I've often
         | wondered whether this really all makes perfect sense to
         | chemists themselves? Like, if I were to surreptitiously change
         | one syllable out of a 10-syllable word, or reverse a couple of
         | the arrows on a flow chart, would anyone in the audience
         | notice? If not, then why is the information being conveyed in
         | this way, seemingly without any effort at comprehensibility?
         | 
         | Edit: don't mean to condescend to chemists. The question is a
         | genuine one. Does it really have to be so inaccessible from
         | start to finish? Maybe yes is the answer, that's the nature of
         | the thing. Physics is not like that, for instance.
        
           | gilleain wrote:
           | > whether this really all makes perfect sense to chemists
           | themselves?
           | 
           | Yes. Obviously! Someone working in a technical field will
           | understand the jargon and notation of that field.
           | 
           | Certainly if you are working in (say) physical chemistry, you
           | might not be familiar with all the terminolgy of (say)
           | organometallic chemistry, or vice versa.
           | 
           | The question of whether the audience might 'notice' is more
           | tricky, but still bizarre. Certainly, changing (say) one part
           | of a long chemical name might escape attention, but so what?
           | 
           | For example, one catalyst due to the prize winners is :
           | 
           | (5S)-2,2,3-trimethyl-5-phenylmethyl-4-imidazolidinone
           | 
           | if I swapped the '2,2,3-trimethyl' and the '5-phenylmethyl'
           | parts of this, it would be likely non-standard nomenclature,
           | and maybe someone might notice. However the information
           | conveyed would be the same.
        
             | superposeur wrote:
             | Ok then! Truly impressive that chemists carry around such a
             | store of jargon.
        
               | gilleain wrote:
               | Well at least they've moved on from the days of alchemy
               | where the tendency was to make up your own notation and
               | jargon to obscure what you actually did :)
        
               | mattkrause wrote:
               | It might help to know these names are formed
               | systematically.
               | 
               | URIs can also look inscrutable, but make more sense once
               | you know how to break them down into
               | scheme://user@host:port/path
               | 
               | Chemical names (mostly) work the same way. There are a
               | fair number of rules and concepts, but once you
               | understand them, the endless names map onto structures
               | pretty cleanly[0]. Here are some of them: http://www.chem
               | .uiuc.edu/GenChemReferences/nomenclature_rule...
               | 
               | [0] Mostly. There are some historical exceptions. Acetone
               | should be called something like 2-propanone, for example,
               | but...it isn't.
        
               | shadilay wrote:
               | Most common chemicals are exceptions to IUPAC naming.
        
           | ampdepolymerase wrote:
           | Would you prefer CS algorithms in papers to be written in
           | English prose rather than pseudo code? Would you notice if
           | your neural network diagram has its arrows reversed? I do not
           | understand HN's superiority complex when it comes to
           | notation. Every thread on music in this forum devolves to
           | complaints about music notation rather than the essence of
           | the art itself. It is disappointing.
        
             | superposeur wrote:
             | To be clear, despite the slightly snarky tone, I don't mean
             | to condescend to chemists! Quite the opposite, this is
             | borne out of disappointment when I listen to a whole chem
             | presentation and fail to grasp even one simple idea. I'm a
             | physicist, btw, and could easily fill a presentation with
             | inscrutable equations but what would be the point of that?
             | Instead I make sure that everyone (even a scientifically
             | literate layperson) can stay on board at least the first
             | third of the presentation.
        
               | siver_john wrote:
               | As someone who sits on the bounds of a lot of fields, I
               | have to say it is surprising what many scientists think
               | are "common knowledge." So having never seen your
               | presentation I would question whether it is even a
               | scientific literate layperson would actually be able to
               | follow.
               | 
               | I distinctly remember being in a room of biologists and
               | having to explain that, your general STEM audience does
               | not automatically know what a protein is. They were
               | incredulous, but I pointed out that I had to just explain
               | that to a computer scientist like a week prior.
               | 
               | For example to you as a physicist I'm sure I could
               | casually drop the word "force field" and you would know
               | exactly what I'm discussing but a biologist or even
               | chemist wouldn't. But it's such a casually thrown around
               | word in my specialty we will just use it without
               | thinking. Similarly Newtonian physics/classical
               | physics/etc.
        
               | sanxiyn wrote:
               | https://xkcd.com/2501/ (Average Familiarity) is very
               | funny, in part because it is 100% real.
        
               | ff10 wrote:
               | I guess it's alway a question of what audience you speak
               | to. OPs explanation could probably be summarized in 2
               | sentences when aimed at chemists.
        
           | fossuser wrote:
           | I share a similar skepticism of people the obfuscate the
           | information with jargon.
           | 
           | Any technical field will have its jargon, but the general
           | concept can also (almost always) be explained in a more
           | accessible way (like the hn comment and the article's
           | introduction do).
           | 
           | I've found people that rely on jargon exclusively sometimes
           | don't actually understand the underlying concepts when you
           | ask them questions that dig into it. It's one of the flags
           | that someone is full of shit. Sometimes it's just targeting a
           | narrow audience.
        
             | bawolff wrote:
             | Its not that they can't be explained more accessibly, its
             | that they shouldn't.
             | 
             | When you talk to other practitioners its more important to
             | be precise and succint than it is to be accessible. Just
             | like the opposite is true when talking to the general
             | public. Different audiences have different needs.
             | 
             | Some people do use excessive jargon to sound "smart" (and
             | they are annoying). Anyone who knows what they are doing
             | should be able to communicate in either mode depending on
             | what the situation demands. Just because some people abuse
             | jargon doesn't mean it doesn't have a valid place.
        
               | fossuser wrote:
               | Yeah - I think we're in agreement.
        
             | cedilla wrote:
             | The space on posters is extremely limited. You condense
             | several person-months into a few sentences and graphics,
             | usually fewer words than OP used.
             | 
             | At the same time, the research is usually very narrow. It's
             | hard but possible to convey a general concept in few words,
             | but if you study the properties of a subclass of a subclass
             | of a subclass of a subclass of organic chemicals, you
             | simply have to use terms of art. You don't have the space
             | to explain what a ligand is, or what paramagnetism is, and
             | you don't need to anyway, because your audience likely
             | understands the concepts better than you do.
        
               | fossuser wrote:
               | I think that makes total sense for a poster.
               | 
               | It's when talking to people that I've noticed a
               | difference. Some people have the jargon, but I can ask
               | questions and learn from them because they can explain
               | the underlying ideas.
               | 
               | Some just hide behind the jargon and can't answer
               | questions - often in the latter the impression I get is
               | that their actual knowledge is pretty shallow. It's not
               | always the case (sometimes people are just bad at
               | communication in general), but it's the case often enough
               | that it's a signal.
               | 
               | It's also something I've noticed more in academia for
               | whatever reason. My off the cuff guess is that both some
               | cultural pressure towards signaling intelligence and
               | prestige is coupled with being hard to understand, and
               | that it's easier to hide with bullshit in academia than
               | in industry. Not that you can't hide in industry too, but
               | entire fields of academia that were total bullshit
               | sometimes perpetuate for decades - companies typically
               | die earlier than that.
        
           | varjag wrote:
           | Yes. Yes they would. Don't make snap judgments about fields
           | you lack competence in.
        
             | superposeur wrote:
             | Don't intend to make snap judgment (despite my unfortunate
             | tone) -- the question is a genuine one. Does it really have
             | to be so inaccessible from start to finish? Maybe yes is
             | the answer, that's the nature of the thing. Physics is not
             | like that, for instance.
        
               | gilleain wrote:
               | I think its the nature of the thing. Some fields are easy
               | to 'big picture' - like physics (apart from quantum-
               | level?) or biology. If they relate to everyday experience
               | then that is surely easier.
               | 
               | Chemistry often deals with the everyday, of course -
               | drugs, paint,fuels, cooking even. However it can also
               | deal with very obscure reactions where the details are
               | entirely technical.
               | 
               | For example, there are whole papers dedicated to "this is
               | the detailed series of steps we found to make this
               | obscure chemical (X) that is difficult to make". That
               | could be summarised as just "we made X!" - not super
               | interesting, by itself...
        
           | [deleted]
        
           | 7thaccount wrote:
           | I have similar problems in my own field where an academic
           | could EASILY explain the core of a problem in a few bullet
           | points, but instead will try to cram 20 lines of dense
           | mathematical formulation in size 8 font on a slide. It is
           | just bad communication. That should be left in the white
           | paper, sure, but not at a conference where 3/4 the room just
           | starts reading email. I try to explain this to academics all
           | the time when they're trying to communicate with industry,
           | but few seem to get it.
           | 
           | Keep in mind, I'm not saying that's the same as what we're
           | talking about in this post, but I thought you'd be interested
           | in the personal anecdote. Clear communication is an art that
           | takes years to master. Unfortunately, a lot of academic
           | papers are not meant for a general audience or even an
           | audience of non academic experts.
        
             | superposeur wrote:
             | Yes that's a good point, clear communication is hard in any
             | field. I want to say to everyone, at least make an effort,
             | though, please?
        
         | dr_dshiv wrote:
         | What a great explanation. Id like to share this old paper on
         | using radio frequency modulation of catalytic activity. Seems
         | like such a neat idea--that chemical catalysts might be
         | emulated through radio waves. Are there better examples or
         | better ways of thinking about this?
         | 
         | https://www.sciencedirect.com/science/article/pii/S000926149...
        
         | gilleain wrote:
         | > So now there's a link between biological catalysis and
         | artificial catalysis that didn't exist before.
         | 
         | Not sure I understand that point. There are plenty of enzymatic
         | reactions that rely on metals. Presumably the point is that
         | there exist non-metalloenzymes that catalyse enantiospecific
         | reactions?
        
           | siver_john wrote:
           | I believe the point is more from a relatively "simple"
           | molecule you can have catalytic reactions that don't require
           | metal or complex protein systems. When applied to the
           | observation about life means that random organic compounds
           | could have started selective catalytic reactions which could
           | have given rise to more complex systems which then give rise
           | to the building blocks of life or something.
           | 
           | This is me speculating on the meaning of the original
           | comment, my knowledge of abiogenesis is lacking and I know
           | RNA can do some enzymatic reactions which are also organic
           | compounds.
        
             | gilleain wrote:
             | That makes sense, thanks.
             | 
             | With regards to abiogenesis, that is a wonderful area for
             | wild speculation. I say that having done a tiny bit of that
             | myself :)
             | 
             | Certainly it would be helpful to have small-molecule
             | catalysts to bootstrap life into having polymer catalysts.
             | 
             | I just do not think it matters much about excluding metals,
             | since there were bound to be sufficient dissolved metal
             | ions floating around. Of course, whether they were the
             | 'right' metals and in a suitable oxidation state and so on
             | is a different question.
        
               | siver_john wrote:
               | I think the importance of organocatalysts besides being
               | potentially less "harsh" is that they can also be more
               | selective in what reactions they allow, which would be
               | important in getting to those polymers. For example most
               | of the amino acids in biology are L-enantiomers. So the
               | reaction in the primordial soup would require catalysts
               | which would bias towards that specific shape, where as a
               | metalocatalyst may be less specific and generate both the
               | L and R enantiomers at equal or near equal rate. Also it
               | could also be that metalocatalysts generate side products
               | at a higher rate such that it consumes say some of your
               | amino acids unhelpfully. So you may be able to think
               | about it as an intermediate step of
               | metals->organocatalysts->polymer catalysts.
               | 
               | Full Disclosure: Am not a chemist but work with chemists,
               | one of which follows MacMillan closely. And have sat
               | through a lot of presentations looking at how different
               | catalysts affect selectivity of products.
        
         | localhost wrote:
         | A bit more detail about how catalysts speed up chemical
         | reactions - to get from products to reactants you need to climb
         | an energy barrier to get to something called the "rate-
         | determining transition state". What catalysts do is stabilize
         | or reduce the amount of energy (called activation energy)
         | required to reach this transition state, and by doing so, the
         | reaction goes faster. The stability is achieved through
         | interactions between the rate determining transition state and
         | the catalyst. Sometimes the catalyst causes a change in the
         | reaction mechanism leading to a different rate-determining
         | transition state as well.
         | 
         | EDIT: pretty sure this was Ben List's first paper on this idea:
         | https://pubs.acs.org/doi/10.1021/ja994280y
         | 
         | David MacMillan's first paper on this idea:
         | https://pubs.acs.org/doi/abs/10.1021/ja000092s
        
           | hi41 wrote:
           | Layperson here. It's my understanding that energy can neither
           | created not destroyed. So if a reaction needs more energy
           | otherwise, then how do catalysts provide that extra energy
           | needed for the reaction yet not fail energy conservancy law?
        
             | ace2358 wrote:
             | I don't think they provide the energy, they change the
             | required energy for a reaction to occur. My understanding
             | is that is can happen due to the physical structure of the
             | catalyst changing the electronic configuration of the
             | molecules being reacted. I think often instead of the two
             | molecules coming into contact and reacting, the two
             | molecules and the catalyst come into contact. It's a whole
             | different reaction, but the catalyst molecule doesn't
             | change its composition and is left unchanged after the
             | reaction.
             | 
             | I guess maybe a terrible analogy would be you're trying to
             | cross a flat field but there is a large group of animals,
             | say, cows in the way. You'd never be able to get through
             | the crowd of cows without exerting a lot of energy. Then
             | suddenly a dog, catalyst, come over and starts shooing off
             | the cows. Now the cows have moved out of the way and the
             | flat field is clear. You can now make the journey while
             | expending less energy.
             | 
             | Hmm maybe someone else can explain it better!
        
         | loufe wrote:
         | Fantastic summary, thank you for taking the time.
        
         | hobofan wrote:
         | > This happens because some molecules have 3D structure that's
         | different than its mirror image.
         | 
         | I assume that you meant to say that that one possible product
         | _is_ the mirror image of the other product.
        
           | feoren wrote:
           | No, I think they meant what they said: we can encounter the
           | situation where 50% of products need to be separated out only
           | because some molecules are chiral. (Actually their comment
           | was extremely carefully (and well-) worded for a social media
           | comment!)
           | 
           | See, in general your statement that reaction products can be
           | mirror images of each other is true for most of the chemical
           | reactions humanity has been able to produce in a lab/factory,
           | yet many reactions don't require separating out 50% of the
           | products because _it doesn 't matter_ that they're mirror
           | images if they're non-chiral molecules. Think of the (non-
           | chiral) letter H: a right-handed and left-handed letter H are
           | the same -- one can always be rotated to match the other.
           | 
           | The only time it matters that most of our chemical reactions
           | can produce either left- or right-handed molecules is when
           | these molecules are actually different, meaning they cannot
           | be rotated to match each other. Think of the (chiral in 2D)
           | letter L. There's no way I can rotate the letter L in 2D
           | space to make it match its mirror image. (Of course I can if
           | I'm allowed to rotate it through 3D space.)
        
             | hobofan wrote:
             | I know how enantiomeres work (chemistry background), I just
             | found the quoted sentence really confusing to read for some
             | reason.
             | 
             | I think the original press release already expressed it
             | well in an easy to understand way with the classic hand
             | example:
             | 
             | > where two different molecules can form, which - just like
             | our hands - are each other's mirror image
        
       | sydthrowaway wrote:
       | What it's like to win the prize to ensure you will be remembered
       | forever.
       | 
       | https://www.nytimes.com/interactive/2015/10/04/science/where...
        
       | cecilpl wrote:
       | I'm surprised that it's only MacMillan and List for
       | organocatalysis. There's plenty of others that come to mind, like
       | Jacobsen.
       | 
       | Regarding MacMillan, his student used proline (which opened the
       | whole proline organocatalysis area) and he said he had "no idea
       | why she did that experiment". He definitely guides his students
       | well.
        
         | regitempus wrote:
         | Can you elaborate on your second paragraph or link to the full
         | story?
        
       | newacct81 wrote:
       | I'm confused how this is related to climate change?
        
         | karol wrote:
         | It doesn't.
        
         | siver_john wrote:
         | I think you may be thinking of the physics Nobel Prize which is
         | work related to climate change, the chemistry has no direct
         | relation.
        
       | coldcode wrote:
       | Sometimes I wish I had started/completed my Chemistry PhD 4
       | decades ago, about the right time for a Nobel...
       | 
       | Instead I wrote code the whole time. No Nobel for that.
        
         | strikelaserclaw wrote:
         | there are probably tons of people who completed a chemistry phd
         | in that time frame who will never get a nobel.
        
           | belval wrote:
           | In this case "a ton" is an understatement, getting a Nobel
           | requires the right mix of excellent research, significant
           | discovery and a healthy dose of luck/timing.
           | 
           | Inverting the comment that you were replying to it's akin to
           | saying "I wish I had finished my software engineer degree and
           | made a billion dollar startup instead of getting a chemistry
           | PhD".
        
           | BurningFrog wrote:
           | If we assume the average weight of a scientist is 80kg, there
           | are 12.5 chemistry PhDs in a ton.
        
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