The reaction of the stable silylene 1 (LΠSi:) with CO, SnCl 2 , Pca2 1 . The bond angles of 115.89 Β°(ave. Si-Sn-Si) and 101.87 Β°(ave. Cl-Sn-Si) show a slightly flattened tetrahedral PbCl 2 , the stable carbene LΠC: (2) and the stable germylene LΠGe: (3) was investigated as a possible approach for the geometry around the tin atom. -Thermolysis of 5 at 100 Β°C led to the deposition of thin films of tin; photolysis resulted synthesis of hetero-polysilanes (poly-carbosilanes, polygermasilanes, poly-stannasilanes). The silylene 1 was found in the formation of tin powder. All thermolysis products could be isolated and were characterized as SnCl 2 , elemental tin, to be inert towards all substrates except SnCl 2 and PbCl 2 . Reaction with SnCl 2 led to the formation of the yellow, LΠSi: (1), LΠSiCl 2 (6) and the new disilane LΠSi(Cl)-(Cl)SiLΠ ( 7). Photolysis led to a reduced product spectrum (formation of tris(silyl)stannane [(LΠSiCl) 3 SnCl] (5) and elemental tin. The photolabile (5) was characterized by multinuclear NMR ( 1 H, Sn + SnCl 2 + 7). Reaction of 1 with PbCl 2 gave elemental lead and LΠSiCl 2 as the only products.