Torquoselectivity is a special kind of stereoselectivity observed in electrocyclic reactions in organic chemistry, defined as `the preference for inward or outward rotation of substituents in conrotatory or disrotatory electrocyclic reactions.` Torquoselectivity is not to be confused with the normal diastereoselectivity seen in pericyclic reacti.....
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http://en.wikipedia.org/wiki/Torquoselectivity
The term refers to the preference for 'inward' or 'outward' rotation of substituents in conrotatory or disrotatory electrocyclic ring opening reactions. JEFFORD, BERNARDINELLI, WANG, SPELLMEYER, BUDA, and HOUK (1992).
Found on
http://www.chem.qmul.ac.uk/iupac/gtpoc/TtZ.html
No exact match found.
