Premium
Low‐Temperature Photochemistry of Previtamin D: A Hula‐Twist Isomerization of a Triene
Author(s) -
Müller Astrid M.,
Lochbrunner Stefan,
Schmid Wolfram E.,
Fuß Werner
Publication year - 1998
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19980302)37:4<505::aid-anie505>3.0.co;2-u
Subject(s) - isomerization , twist , photochemistry , chemistry , catalysis , organic chemistry , geometry , mathematics
What is the standard course of the cis – trans isomerization of nonpolar polyenes? Many results support a pathway in which only a central CH group rotates out of the plane, while the remaining parts of the molecule reorient within the plane (“hula‐twist” mechanism). The intermediate structure through which the molecule passes corresponds to the geometry predicted for the conical intersection of the S 1 and S 0 potential energy surfaces (see picture).