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Updated: Jul 14, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Chiroptical properties and racemization behavior of highly distorted donor-acceptor tetracyanoanthraquinodimethane
Hideaki Saito1, Tadashi Mori, Yumi Origane
1Department of Applied Chemistry, Osaka University, Suita 565-0871, Japan.
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.
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