Preparation and Isomerization of 3,4-Bis(2,4,6-tri-<i>t</i>-butylphenylphosphinidene)cyclobutenes
作者:Kozo Toyota、Katsuya Tashiro、Masaaki Yoshifuji、Shigeru Nagase
DOI:10.1246/bcsj.65.2297
日期:1992.8
ne)cyclobutenes were prepared by desilylation reaction of the corresponding 1,2-bis(trimethylsilyl)cyclobutenes or by thermal isomerization reaction of 1,6-bis(2,4,6-tri-t-butylphenyl)-1,6-diphospha-1,2,4,5-hexatetraene. Optimized structures and total energies of various parent compounds C4H4P2 were calculated by ab initio method and the effect of steric congestion on the valence isomerization is discussed
(E,E)- 和 (E,Z)-3,4-双(2,4,6-三叔丁基苯基亚膦)环丁烯通过相应的 1,2-双(三甲基甲硅烷基)环丁烯或通过 1,6-双(2,4,6-三叔丁基苯基)-1,6-二磷酸-1,2,4,5-己四烯的热异构化反应。采用从头算方法计算了各种母体化合物C4H4P2的优化结构和总能量,并讨论了空间拥挤对化合价异构化的影响。