title: Chiroptical properties and racemization behavior of highly distorted donor-acceptor tetracyanoanthraquinodimethane with interconvertible planar chirality.
abstract: Absolute configuration of optically active 7,12-bis(dicyanomethylene)-7,12-dihydrobenz[a]anthracene (1) with interconvertible planar chirality was determined by a comparison of experimental and theoretical circular dichroism (CD) spectra. Upon standing at ambient temperatures, 1 was found to spontaneously racemize, the rates of which were assessed through the separation profiles of chiral HPLC at 5-20 degrees C and also from the CD spectral decay profiles at the same temperatures. Mechanism of the racemization was discussed.
authors.affiliation: Department of Applied Chemistry, Osaka University, Suita 565-0871, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Saito
authors.forename: Tadashi
authors.initials: T
authors.lastname: Mori
authors.forename: Yumi
authors.initials: Y
authors.lastname: Origane
authors.forename: Takehiko
authors.initials: T
authors.lastname: Wada
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Inoue