title: Synthesis and structures of heteroleptic silylenes.
abstract: The reaction of benzamidinato silicon trichloride [{PhC(NR)2}SiCl3] [R = Bu(t) (1), SiMe3 (2)] with 2 equiv of potassium in THF afforded mononuclear chlorosilylene [{PhC(NBu(t))2}SiCl] (3) and [{PhC(NSiMe3)2}2SiCl2] (4), respectively. Compound 4 was formed by the disproportionation of unstable [{PhC(NSiMe3)2}SiCl]. The reaction of [{PhC(NBu(t))2}SiCl3] (1) with 1 equiv of LiR (R = NMe2, OBu(t), OPr(i), PPr(i)2) in THF yielded [{PhC(NBu(t))2}SiCl2R] [R = NMe2 (5), OBu(t) (6), OPr(i) (7), PPr(i)2 (8)]. Treatment of 5-8 with 2 equiv of potassium in THF resulted in the novel heteroleptic silylene [{PhC(NBu(t))2}SiR] [R = NMe2 (9), OBu(t) (10), OPr(i) (11), PPr(i)2 (12)]. Compounds 4, 9, and 12 have been analyzed by X-ray crystallography.
authors.affiliation: Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany.
authors.forename: Cheuk-Wai
authors.initials: CW
authors.lastname: So
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
authors.forename: Prabhuodeyara M
authors.initials: PM
authors.lastname: Gurubasavaraj
authors.forename: Rainer B
authors.initials: RB
authors.lastname: Oswald
authors.forename: Michael T
authors.initials: MT
authors.lastname: Gamer
authors.forename: Peter G
authors.initials: PG
authors.lastname: Jones
authors.forename: Steffen
authors.initials: S
authors.lastname: Blaurock