Cahn-Ingold-Prelog Convention (Determining R/S)

Рет қаралды 323,706

9 жыл бұрын

In this clip, the Cahn-Ingold-Prelog Convention is introduced, to allow for assignment of absolute configuration of stereocenters. I dunno why it took three dudes to make the convention, but it's pretty sweet if you think about it.
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@ProfessorDaveExplains 6 жыл бұрын

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@luftatmer 4 жыл бұрын

@@ProfessorDaveExplains 1:45 what about double/triple bonds after you hit a point of equivalency? still just go by atomic mass?

@ProfessorDaveExplains 4 жыл бұрын

so there you treat each bond separately, so a double bond to carbon is treated like two single bonds to two separate carbon atoms, etc.

@luftatmer 4 жыл бұрын

@@ProfessorDaveExplains great, thanks!

@arnold4712 6 жыл бұрын

"Thanks for watching, guys"....no, thank YOU

@kaitdoeschem9181 5 жыл бұрын

SAME

@AmiraDreams 9 жыл бұрын

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@adityasharma2380 3 жыл бұрын

And the organic chemistry tutor...... He is solid too

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Not so far, he is forever ♾️

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I just graduated with my undergrad and I had never thought of the different spatial orientation view... The way you explain things makes so much sense! Thank you!

@to181 5 жыл бұрын

I was having issues with spacial imagination until I saw you look at the hydrogen and imagined it in the back and then you could see all the 1,2,3 priorities in the plane. Thanks so much!!

@Mrjmaxted0291 5 жыл бұрын

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I've seen many of your videos they are all to the point .Easy to understand . You explain very well that it leaves me with no confusion .

@clark0660 8 жыл бұрын

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@michaelleonardlubiano3912 6 жыл бұрын

You have explained the Cahn-Ingold-Prelog convention well, my dear Prof Dave! Thank you so much!

@liyamariyamsalman5276 3 жыл бұрын

I had been spending hours figuring out R and S and the E and Z config!!! But prof Dave.. You have saved my day.. Your videos are super cool and way way easier to process mentally than the hours of lectures i have heard.. Thank you sir❤

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I thank you from the bottom of my heart

@langelihlekhumalo2860 4 жыл бұрын

Wow, this was super helpful!! The way you explained it and made it so simple makes me feel dumb for not getting it in the first place😂

@joyceampong2756 5 жыл бұрын

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@lancemaxwell8464 Жыл бұрын

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@g_ayugane Жыл бұрын

Hope Crash Course doesn’t see this comment🫣

@13Drumsticks 7 ай бұрын

Once again beautifully explained and a perfect refresher to come back after a long time out of OC. Thanks so much!

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@ProfessorDaveExplains 8 жыл бұрын

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@Nique658 7 жыл бұрын

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@zacharychapman3732 5 жыл бұрын

This helped so much. I spent a lot of time on Khan Academy trying to figure this out.. I'll come here first next time. Thanks!

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@DatDack 5 жыл бұрын

the fact that my profs try to make us waste our time building every molecule to assign R and S is absurd - thanks so much for this new technique, it's so much more efficient!

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@shannonoconnor1264 5 жыл бұрын

my professor exmplained something about swivelling a double bond and it went straight over my head, this is so much easier to get

@motivational_Insights Жыл бұрын

thank you so much. I have looked everywhere until i got you. this explains my predicament. I knew the wedge or dashed hydrogen but when in the plain the textbook I use said nothing about it. Thank you so much

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@aryansonu2440 5 жыл бұрын

This Puzzled me from last three days but after watching ur video I resolved it ... thanks sir

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@amccutcheon1988 Жыл бұрын

Thanks for clarifying the priority system.

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3 hour lecture of my bad professor which was painful to try and understand, summarized in 11 minutes. Thank you Professor Dave!

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@michellerabi6511 8 жыл бұрын

Thank You, Professor Dave. For many things, but today, for teaching me chemistry as my professor I paid can't seem to explain it.

@user-sy5gw3jd3y 6 ай бұрын

No one taught me that I can arrange the molecule specially, everyone sticked to the cheat method and that confused me a lot, thank you

@shannonheinig8912 2 жыл бұрын

8:10 thanks I’d never thought of it like this

@PodBites77 6 жыл бұрын

Sir, you are a great teacher.

@videosformybrain3606 4 жыл бұрын

watched a days worth of r/s configuration, I think this is the best method

@dulyanaapoorvawanigasooriy1520 2 жыл бұрын

Best explanation ever. Thanks Prof.!

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@psy_inamorato5703 2 жыл бұрын

Do you got it?

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Thank you so much for this video!

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I learned with you more easier than how my Prof. trying to teach us. OMG thanks a lot Love from Türkiye

@curtpiazza1688 2 жыл бұрын

Great brief explanation!

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I have an exam tomorrow and you really assisted me

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@IrfanKhan-ys9he 9 жыл бұрын

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@VytautasP 3 жыл бұрын

this was epic- thank you

@PaKiKiNg908 6 жыл бұрын

best chemistry professor ever!!!!!!!!!!

@prathameshsannak6182 6 жыл бұрын

Thanks professor..... You made it easy

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You saved my future really

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Awesome video!

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stay bless dude

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Awesome sir... U taught us very well🙂

@chintusct5258 4 жыл бұрын

you made my chem configuration very comfortable...

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@akirauzumaki3805 3 жыл бұрын

Your explanation is super easy to comprehend and super nice! Thanks prof.! i finally can pass my exams now lol XD

@MrDelagatti 5 жыл бұрын

Outstanding video!

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Thanks Prof Dave! I am taking an online Chem course and you have been extremely helpful.

@ProfessorDaveExplains 7 жыл бұрын

happy to be of service!

@poodles4058 7 жыл бұрын

Professor Dave Explains but if they do not give where the wedge bond and dash bond is how would I know whether the hydrogen is in the front or back of the compound

@ProfessorDaveExplains 7 жыл бұрын

prathyush srinivasan good question, you can't! some kind of three-dimensional notation must be used to assess stereochemistry.

@poodles4058 7 жыл бұрын

Professor Dave Explains oh okay

@khalifabio Жыл бұрын

Thank you very much Professor

@pranav_manoj 4 жыл бұрын

THANK YOU SOOOO MUCH !!!

@akrampasha1300 5 жыл бұрын

Supercool explanation. Thanks

@Valium-jh9or 3 жыл бұрын

2:50 is the reason im here, never got that thank you so much..

@vipinagarwal7715 7 жыл бұрын

i really liked the method of orienting myself in the plane and see the structure. and get the answer quickly

@velaharivelahari8748 5 жыл бұрын

Thank you so much sir it was very useful...I was confused with this but now everything is absolutely clear...Thanks a tonne for this vedio

@vasavipaidakula906 2 жыл бұрын

👌Really helpful simple and superbbb

@_pe_gah 3 жыл бұрын

You’re amazing!

@shobhit7212 6 жыл бұрын

It is really amazing,now i can visualise it.👌

@siyabongankosi9956 6 жыл бұрын

again I'm impressed

@alessandrac1940 5 ай бұрын

i simply remembered 2 acronyms: ACR and TCS.. to elaborate, if the lowest priority group (usually H but not always) is away from me and i count the groups in a clockwise order, then the molecule is designated (R). If LPG is towards me and it's clockwise then it's (S). idk if that helps

@heiitsme182 3 жыл бұрын

he is absolutely legend

@aziz-qp7pm 7 жыл бұрын

HOLY FUCKING SHIT FINALLY A WAY TO ASSIGN R AND S WITHOUT CONCEPTUALIZING!!!!

@amanullah4718 8 ай бұрын

Great lecture ❤

@aparnajha9300 5 жыл бұрын

Nice explanation sir,thanks

@katybechnikova2821 7 жыл бұрын

i know a mnemotechnic help with the r/s. if you have the substituent 4 already away, picture yourself turning a car. the molecule is steering wheel and you turn it from 1 to 2 and then 3. if your imagined car is going right, it's R, if left, it's S.