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Stereodescriptors with small letter and number
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Topic: Stereodescriptors with small letter and number (Read 1853 times)
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Rutherford
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Stereodescriptors with small letter and number
«
on:
June 16, 2014, 08:35:04 AM »
What does the stereodescriptor
3a
on the carbon atom adjacent to the nitrogen mean?
Is
a
for axial chirality?
Why is the number
3
?
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discodermolide
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Re: Stereodescriptors with small letter and number
«
Reply #1 on:
June 16, 2014, 09:27:15 AM »
a is not for axial orientation. The 3a is used to differentiate the other C atom that is numbered 3. That's all there is to it.
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Rutherford
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Re: Stereodescriptors with small letter and number
«
Reply #2 on:
June 16, 2014, 09:29:06 AM »
Which is the other atom?
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discodermolide
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Re: Stereodescriptors with small letter and number
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Reply #3 on:
June 16, 2014, 12:52:01 PM »
The one with the (R) above it, next to the one with the 4 above it.
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Rutherford
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Re: Stereodescriptors with small letter and number
«
Reply #4 on:
June 16, 2014, 02:25:11 PM »
Okay, thanks. Nomenclature seem to be the toughest part of organic chemistry
.
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Stereodescriptors with small letter and number