From Silabenzene to Cyclopropenylidene

Abstract

Isolation and identification of a number of highly reactive species are described. The main route for their preparation involves the combination of flash pyrolysis and matrix isolation in argon at 10 K. This article covers hetero-π-systems like silabenzene, silaethene, 1,4-disila benzene, derivatives of borabenzene and boraethene as well as pure carbocyclic compounds with peculiar electronic characteristics. In this context some new aspects of cyclobutadiene-, tetrahedrane and cyclopentadienone-chemistry are discussed. The main emphasis within this part is directed towards the C4H4 potential surface. The article ends with a short comment on cyclopropenylidene. © 1986 IUPAC