Finding R and S When Group #4 is Forward - Stereochemistry Vid 3
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- Опубліковано 8 вер 2024
- How to find R and S Configurations when priority group #4 is facing forward in chirality and stereochemistry (Vid #3) by leah4sci.com/ch...
📺Watch Next: Enantiomers, Diastereomers and Meso Compounds • Enantiomers, Diastereo...
This video shows you why and how to reverse R and S when group #4 is forward to help you quickly and easily master relative configurations when studying chirality and stereochemistry.
Struggling with Organic chemistry? Grab my free ebook '10 Secrets To Acing Organic Chemistry' leah4sci.com/or...
This is Video 3 in the Chirality/stereochemistry series. Catch them all including my practice quiz and cheat sheet by visiting Leah4sci.com/ch...
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thanks so much for this the perspective explanation really helped because not knowing why we are "flipping" the configuration was what made it so confusing before
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Haha thank you so much! I don't want to work for a university, I'd rather post videos to UA-cam for everyone to see
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I'm having a hard time understanding why in the example at 7:10 the #2 is priority over #3. Is it because you would consider that chain to be CH2C(CH3)2 vs CH2CH2CH2? I feel like I understand this stuff well until I get to long carbon chains with multiple substituents or alkene/ynes, then I get lost.
I'm sorry, but I don't offer tutoring over social media. If you ever find you need help with questions like this again, I recommend joining the organic chemistry study hall. Details: leah4sci.com/join or contact me through my website leah4sci.com/contact/
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Could you also do the swap method when the lowest priority group is on a wedge/forward?
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But then I couldn't make videos! :)
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Any quick tip for when Group #4 is in the same plane of the page?
Yes, swap method - effective and VERY quick. I teach that in the next video of this series
Does OH have more priority than O or is it the opposite?
An oxygen will not exist by itself so it depends on what else is there. Meaning, is it a pi bond or ether? Pi bonds count as 2, ether has a C on the O which outranks H on the O in OH
Have you got something about Masamune convention?
I'm sorry, but no
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I get that D and L config is about light rotation, but what is the point of R and S config?
Classifying molecules and providing fun test questions
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What if the 4th priority group is in the plane?
Then I recommend using the swap method as I teach here leah4sci.com/chirality
Can i use the swap method?
yes, but why work harder if this is faster? I prefer swapping for comparisons or when #4 is in the plain of the page
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No need, just a like will be fine :)
We have to learn all this stuff in our 12th grade 😢 only !
I am from India and preparing for iit jee exam.
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Why is 2 and 3 on the CH3 even though the left side of the octagon is longer than the one on the right?
I'm sorry, but I don't offer tutoring through UA-cam comments. For help with this and more, I recommend joining the organic chemistry study hall. Full details: leah4sci.com/join
or just count 3 2 1 and draw the arrow
That works when #4 is back, when it's forward you have to reverse the direction
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Glad I could help