Check out my tips for revising organic chemistry = kzread.info/dash/bejne/jKt8z82jpNiaf9I.html

thank you!! you explained it so perfectly

@mrmurraygreen

Ай бұрын

Glad it was helpful!

in school i was taught that the lone pairs also are contributing to the chiral centers, so the NH(secondary amine) has a lone pair with 3 different groups, so it is a chiral center, if this thin is true then tertiary amine also has a lone pair, in total having 4(in the video) + 2 = 6

@mrmurraygreen

7 күн бұрын

Hi, an excellent question! Pyramidal nitrogens which are bonded to 3 different groups (whilst still having a lone pair), e.g. amines like you mentioned, are classed as achiral as they invert their own shape at RTP back and forth between their own isomers. Therefore we do not include them in the count. If we were able to create conditions where the inversion doesn’t happen then we would include them.

Total no. Of stereocentres in this?... 7?

So how many optical isomers would this have is it 16 or 8?

@UJLMAO

2 ай бұрын

If so why

@mrmurraygreen

2 ай бұрын

Hello - it would be 16. The rule is 2^n (‘2 to the power of n’) where n is the number of chiral centres. So here this would be 2 to the power of 4 which is 16.

@UJLMAO

2 ай бұрын

@@mrmurraygreen I don’t really understand why though. If from each chircal carbon you can form two optical isomers wouldn’t it be 8 since 4*2 is 8. Id don’t really understand

@mrmurraygreen

2 ай бұрын

@@UJLMAO There are 4 chiral centres and each one can either be R or S (like E or Z) so we need to consider all the possible combinations of this. e.g. RRRR, RRRS, RRSS, RSSS, SSSS, RRSR etc. There are 16 combinations.

Why c doube bond ke saath wala n chiral ni h?

@mrmurraygreen

6 ай бұрын

The carbon atom needs to be in 4 sigma (single) bonds

@laxyin2463

6 ай бұрын

he meant why the nitrogen in the ring isnt chiral@@mrmurraygreen

@shresthroy3833

5 ай бұрын

Bhai pata chala bata do please

@nehapatel4865

5 ай бұрын

Chiral center only applied in sp3 hybridization

@laxyin2463

4 ай бұрын

so the nitrogen isnt sp3 hybridised?@@nehapatel4865

Can nitrogen be chiral center

@mrmurraygreen

5 ай бұрын

Yes- so can phosphorous - check this out = kzread.info/dash/bejne/l2horKaKeZCWmrQ.htmlsi=zKelM9xyUPBVlr0g

First

it is not called a chiral center, it is a chiral molecule and the center is stereogenic ;)

@mrmurraygreen

8 ай бұрын

It is called a chiral center because I’m purely bring all of this up in the context of a carbon atom being bonded to 4 different atoms or groups within a molecule. Stereogenic centre has a broader definition. Thanks for watching.

@Stephen__tari

12 сағат бұрын

They're synonymous