All Questions
Tagged with stereochemistry terminology
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What is the meaning of "proto" in nomenclature?
"Proto" is generally used to describe "first", "foremost" or "earliest form of (something)" indicating something primitive that transforms into something known ...
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What does it mean when a molecule is described as "optically stable"?
In this question about "Why don't trigonal S and P compounds undergo inversion at room temperature?", phosphines, sulfoniums and sulfoxides are described as "optically stable", ...
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Terminologies used in isomerism [closed]
What is the difference between the terms constitutional isomers, stereoisomers, geometric isomers?
I know cis and trans-1,2-dichloroethane shows cis trans isomerism and 1,1 dichloroethene, 1,1,2 ...
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What is the name of "cis/trans" isomerism when all four groups are different?
How would you call a pair of isomers on the picture below?
They look a lot like regular cis/trans isomers, except all four groups are different. I can tell they are spacial isomers (stereoisomers) ...
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Why atropisomers are called conformers?
Changing one atropisomer to another requires bond breaking (in some cases the removal and reattachement of steric groups, according to my understanding) so how it is possible that according to IUPAC ...
user35715
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What kind of stereoisomerism do cisplatin and transplatin exhibit?
Cisplatin and transplatin are obviously isomers, more precisely stereoisomers. Now, they aren't chiral, so they cannot be enantiomers. They cannot be diastereomers either since they don't have two ...
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What's the exact difference between (-)-BTX and (+)-BTX
I quite liked this article, which describes the synthesis of (-)-batrachotoxin as well as a steroisomer, (+)-batrachotoxin. I would like to know what the precise difference is between the two: are ...
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Defining a stereospecific reaction
My textbook says that a reaction which gives different stereoisomeric products when the different stereoisomers of starting material are used in a stereospecific reaction.
Is it necessary that all ...
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What are two superimposable mirror images called? [closed]
I know that enantiomers are mirror images which are not superimposable on each other.
What about mirror images which are superimposable? Are they necessarily the same molecule? Is there a particular ...
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What is the absolute configuration of carbon 4 in glucopyranose?
My colleague and I have been wrestling with the assignment of chirality to the 4th carbon atom in glucopyranose. In the linear form of glucose, the 4th carbon is definitely (R); therefore it will ...
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