Synthesis, Structure, and Photochemistry of 2,3,5,6-Tetrasilyl-1,4-benzoquinones and Related Compounds
作者:Shinobu Tsutsui、Kenkichi Sakamoto、Keisuke Ebata、Chizuko Kabuto、Hideki Sakurai
DOI:10.1246/bcsj.75.2571
日期:2002.12
3,5,6-tetrakis(trimethylsilyl)-1,4-benzoquinone (1a) was distorted into a chair form. The deformed quinone ring allowed a σ(Cquinone-Si)–π* electronic transition in 1a. Photolysis of 1a resulted in an isomerization, creating a ketene derivative, 4-carbonyl-2,3,5,5-tetrakis(trimethylsilyl)-2-cyclopenten-1-one.
通过用氯铬酸吡啶鎓氧化相应的 1,4-二甲氧基苯衍生物,获得 2,3,5,6-四甲硅烷基-和 2,3,5,6-tetragermyl-1,4-苯醌。X 射线晶体学分析表明,2,3,5,6-四(三甲基甲硅烷基)-1,4-苯醌 (1a) 的醌环扭曲成椅子形式。变形的醌环允许 1a 中的 σ(Cquinone-Si)-π* 电子跃迁。1a 的光解导致异构化,产生乙烯酮衍生物 4-carbonyl-2,3,5,5-tetrakis(trimethylsilyl)-2-cyclopenten-1-one。