Chalcogenation of 1,2-Bis(ferrocenyl)disilene: The First Isolation of 1,2,3,4-Dithiadisiletane

Abstract

1,2-Bis(ferrocenyl)-1,2-bis(2,4,6-triisopropylphenyl)disilene was treated with elemental chalcogens to give the corresponding chalcogenation products, the structures of which are varied depending on the kinds of chalcogen used. One of the sulfurization products is of particular note as the first stable example of a 1,2,3,4-dithiadisiletane, the molecular geometry of which was revealed by X-ray crystallographic analysis for the first time. In contrast to the case of sulfurization, the selenation of this 1,2-bis(ferrocenyl)disilene resulted in the exclusive formation of a selenadisilirane derivative as a stable crystalline compound. Oxygenation of 1,2-bis(ruthenocenyl)disilene was also examined.