摘要
以2,2,6,6-四甲基-4-乙酰氧基哌啶氧铵六氯锑酸盐(1)为单电子氧化剂制备了N-甲基、N-乙基、N-正丁基、N-苯基和N-对-硝基苯基等五种吩噻嗪自由基正离子六氯锑酸盐单晶(3a—3e),并对3a和3b作了X射线结构分析,发现它们的分子构型与其母体中性分子有明显的差别,说明在自由基正离子中存在着很强的共轭效应和超共轭效应。
2,2,6, 6-Tetramethyl-4-acetyloxypiperidine oxoammonium hexachloroantimonate (1) was used as an one electron oxidant to prepare single crystals of N-methyl, N-ethyl,N-n-butyl, N-phenyl and N-p-nitrophenyl-phenothiazine radical cation hexachloroantimonates (3a—3e) respectively. Molecular structure of 3a and 3b were evaluated by X-ray difraction analysis. It is shown that the configuration of the radical cations are quite different from those of their neutral molecules, indicating that strong conjugative and hyperconjugative effects are present in the radical cations.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第12期1199-1203,共5页
Acta Chimica Sinica
基金
国家自然科学基金
国家教委博士点基金
