title: High yield access to silylene RSiCl (R = PhC(NtBu)2) and its reactivity toward alkyne: synthesis of stable disilacyclobutene.
abstract: Two new approaches for synthesizing RSiCl, (R = PhC(NtBu)(2)) are reported by the reaction of RSiHCl(2) with bis-trimethyl silyl lithium amide and N-heterocyclic carbene respectively. In the former method silylene is produced in 90% yield. The silylene was treated with biphenyl alkyne to afford the disilacyclobutene system. This is a rare example of two five-coordinate silicon centers arranged adjacent to each other in a four-membered ring. Furthermore, we fluorinated the four-membered ring by trimethyltin fluoride to obtain the fluoro substituted disilacyclobutene.
authors.affiliation: Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany.
authors.forename: Sakya S
authors.initials: SS
authors.lastname: Sen
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
authors.forename: Daniel
authors.initials: D
authors.lastname: Stern
authors.forename: Julian
authors.initials: J
authors.lastname: Henn
authors.forename: Dietmar
authors.initials: D
authors.lastname: Stalke