Phytochrome Models, III1) The Interconversion Barrier of the Bilatriene Helix

Abstract
In a 1H‐NMR kinetic study of the centrochiral bilatriene 3, a barrier of 42 kJ/mol (205‐195 K, statistical error ± 2 kJ/mol) has been determined for the interconversion of its two diastereoisomeric helical conformations.