A zwitterionic disilanylium from an unsymmetrical disilene

The reaction of PhC(NtBu)2SiSi(SiMe3)(3) (1) with Me3SiCH(2)Cl afforded an unsymmetrical sp(2)-sp(3) 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 Si=E (E=S (4) and Se (5)) double bonds. Tellurium reacted differently with 2 and furnished a zwitterionic compound, 6.

Automated summary

Compound 1 reacts with Me3SiCH(2)Cl to generate an unsymmetrical sp(2)-sp(3) disilene, 2, with the elimination of Me3SiCl. The reaction of compound 1 with PhC(NtBu)2SiCl undergoes oxidative addition of the C-Cl bond at the Si(II) atom, resulting in compound 3. Compound 2 reacts with sulfur and selenium to form compounds with Si=E (E=S (4) and Se (5)) double bonds. Tellurium reacts differently with compound 2 and forms a zwitterionic compound, 6.