Preparation and Properties of Chiral Nitroxide Radicals with Helical Crystal Structure
作者:
Rui Tamura,
Shinsuke Susuki,
Nagao Azuma,
Akira Matsumoto,
Fumio Toda,
Takeji Takui,
Daisuke Shiomi,
Koichi Itoh,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 271,
issue 1
页码: 91-96
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508034041
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A new type of α-asymmetric bicyclic nitroxides were synthesized by three electron reduction of certain homoallylic nitroenones followed by the reaction with nitro-substituted benzoyl chlorides. Some nitroxides thus obtained turned out to exist as a conglomerate (racemic mixture), an equimolecular mixture of two crystalline enantiomers, and hence induced spontaneous optical resolution upon recrystallization. The relationship between the formation of conglomerates and their molecular and crystral structures is described, together with the preliminary results of their paramagnetic susceptibility mesurements.
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