A zwitterionic disilanylium from an unsymmetrical disilene

Abstract

The reaction of PhC(NtBu)₂SiSi(SiMe₃)₃ (1) with Me₃SiCH₂Cl afforded an unsymmetrical sp²–sp³ disilene, 2, with concomitant elimination of Me₃SiCl. The analogous reaction with PhC(NtBu)₂SiCl resulted in the oxidative addition of the C–Cl bond at the Si(II) atom (3). The reactions of 2 with sulfur and selenium led to compounds with SiE (ES (4) and Se (5)) double bonds. Tellurium reacted differently with 2 and furnished a zwitterionic compound, 6.