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Difference between revisions of "Conformational nomenclature"

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(New page: * Author: Stephen Withers * Responsible Curator: Spencer Williams ---- The conformations adopted by the ring are denoted by a simple sy...)
 
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* [[Author]]: [[User:Withers|Stephen Withers]]
 
* [[Author]]: [[User:Withers|Stephen Withers]]
 
* [[Responsible Curator]]:  [[User:SpencerWilliams|Spencer Williams]]
 
* [[Responsible Curator]]:  [[User:SpencerWilliams|Spencer Williams]]
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The particular conformation is then denoted by determining the four atoms that define the plane, assigning a 'top' and 'bottom' face through the use of a left-hand rule, counting in the order of increasing ring carbon; and then indicating the identities and relative positions (top face = superscript and prefix; bottom face = subscript and suffix) of the remaining two atoms on that capital letter. In the case of the envelope conformation, only a single atom is located outside of the plane.
 
The particular conformation is then denoted by determining the four atoms that define the plane, assigning a 'top' and 'bottom' face through the use of a left-hand rule, counting in the order of increasing ring carbon; and then indicating the identities and relative positions (top face = superscript and prefix; bottom face = subscript and suffix) of the remaining two atoms on that capital letter. In the case of the envelope conformation, only a single atom is located outside of the plane.
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[[Category:Definitions and explanations]]
 
[[Category:Definitions and explanations]]

Revision as of 03:38, 16 July 2009


The conformations adopted by the ring are denoted by a simple system in which a capital letter indicates the overall shape, C = chair, B = boat, H = half chair, S = skew boat, E = envelope. The first four of these conformations has four atoms in a plane; the envelope conformation has five.

The particular conformation is then denoted by determining the four atoms that define the plane, assigning a 'top' and 'bottom' face through the use of a left-hand rule, counting in the order of increasing ring carbon; and then indicating the identities and relative positions (top face = superscript and prefix; bottom face = subscript and suffix) of the remaining two atoms on that capital letter. In the case of the envelope conformation, only a single atom is located outside of the plane.