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Enantioresolution and absolute stereochemistry of a photochromic bis(benzo[b]thienyl)ethene compound
T Yamaguchi1, Y Tanaka, H Nakazumi
1Department of Advanced Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai, Japan. tyama@ams.osakafu-u.ac.jp
Enantiomer
|January 5, 2002
Abstract:
The colored closed-ring isomers of a bis(benzo[b]thienyl) type photochromic diarylethene compound were enantioresolved by chiral column chromatography. The absolute stereochemistry of a (-)633-compound was determined by X-ray crystallography as (S,S). The relationship between the absolute stereostructure and the circular dichroism (CD) spectrum is discussed.