STABLE N,N'-DI-TERT-BUTYL-META-PHENYLENE-BISNITROXIDES - UNEXPECTED GROUND-STATE SINGLETS

被引：102

作者：

DVOLAITZKY, M ^{[1
]}

CHIARELLI, R ^{[1
]}

RASSAT, A ^{[1
]}

机构：

[1] ECOLE NORM SUPER,CHIM LAB,24 RUE LHOMOND,F-75231 PARIS 05,FRANCE

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1992年 / 31卷 / 02期

关键词：

D O I：

10.1002/anie.199201801

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In contrast to m-xylylene and related diradicals, bisnitroxide 1 has a singlet ground state according to ESR spectroscopic investigations. Diradical 1 can be isolated as two stable atropoisomers. In both, the free electron is possibly localized on the oxygen atom, because conjugation is prevented by the steric hindrance of the methyl groups. The parent compound with an unsubstituted benzene ring has a triplet ground state.

引用

页码：180 / 181

页数：2

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