Isomeric Metamorphosis: Si<sub>3</sub>E (E = S, Se, and Te) Bicyclo[1.1.0]butane and Cyclobutene
作者:Vladimir Ya. Lee、Shogo Miyazaki、Hiroyuki Yasuda、Akira Sekiguchi
DOI:10.1021/ja800111r
日期:2008.3.1
(2.2616(19) A for 2b and 2.2771(13) A for 2c), a phenomenon explained by the important contribution of the trisilirene-chalcogen pi-complex character to the overall bonding of 2. Photolysis of 2a and 2b produced their valence isomers, the heavy cyclobutenes 3a and 3b, featuring flat four-membered Si3E rings and a planar geometry of the Si=Si double bond. The mechanism of such isomerization was studied