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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: vivekfan on June 07, 2009, 04:31:36 PM

Title: syn/anti nomenclature and tautomerization
Post by: vivekfan on June 07, 2009, 04:31:36 PM
Firstly, what is the syn/anti nomenclature and when is it used?

Secondly, what is tautomerization and a tautomer?
Title: Re: syn/anti nomenclature and tautomerization
Post by: Borek on June 07, 2009, 04:45:56 PM
Thirdly, have you read forum rules (http://www.chemicalforums.com/index.php?topic=33740.0)? Definitions can be found by 15 seconds googling. We can help you understand them once you will read them, but nobody is going to do the legwork for you.
Title: Re: syn/anti nomenclature and tautomerization
Post by: vivekfan on June 07, 2009, 11:10:14 PM
Quote from: Borek on June 07, 2009, 04:45:56 PM
Thirdly, have you read forum rules (http://www.chemicalforums.com/index.php?topic=33740.0)? Definitions can be found by 15 seconds googling. We can help you understand them once you will read them, but nobody is going to do the legwork for you.

I'm sorry..I have read the definitions, but often need help clarifying.  Also, I do my work very thoroughly, i just sometimes want to make sure that my understanding is correct, that's all. Next time, I'll try to be more specific about questions.
Title: Re: syn/anti nomenclature and tautomerization
Post by: CrimpJiggler on November 28, 2011, 07:10:32 AM
Sorry to be resurrecting this thread but I'm having a real hard time figuring out what syn and anti isomers are and stumbled upon this thread. I know about cis/trans and Z/E nomenclature for geometric isomers but I'm having trouble figuring out what syn and anti means.

My question: What is the difference between cis/trans and syn/anti nomenclature?
Title: Re: syn/anti nomenclature and tautomerization
Post by: discodermolide on November 28, 2011, 10:47:20 AM
Quote from: CrimpJiggler on November 28, 2011, 07:10:32 AM
Sorry to be resurrecting this thread but I'm having a real hard time figuring out what syn and anti isomers are and stumbled upon this thread. I know about cis/trans and Z/E nomenclature for geometric isomers but I'm having trouble figuring out what syn and anti means.

My question: What is the difference between cis/trans and syn/anti nomenclature?

cis/trans usually refer to substituents around a multiple bond (can also be used in ring systems). syn/anti usually to substituents along a saturated chain or a ring system.