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Difference between revisions of "Conformational nomenclature"
(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 04:38, 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.