Compounds of Germanium and Tin, 22 – Reactions of a Silyene with a Germylene and a Stannylene: Formation of a Digermene with an Unusual Arrangement of the Substituents and of a Stannane

Abstract

AbstractThe reaction of the diaminosilylene :Si(tBuNCH2CH2NtBu) (5) with the diaminogermylene :Ge(tBuNCH2CH2NtBu) is thought to proceed via a germasilene → silylgermylene rearrangement and dimerisation to furnish the (Z)−1,2‐diamino‐1,2‐disilyldigermene (Z)‐9. The X‐ray structure analysis of (Z)‐9 reveals a long GeGe bond length of 245 pm and a large trans‐bent angle of 42°. Air‐oxidation of (Z)‐9 takes place with retention of configuration at the germanium atoms to provide the corresponding substituted (Z)−2,4‐digerma‐1,3‐dioxetane (Z)‐10. Treatment of 5 with the stannylene :Sn[N(SiMe3)2)2 gives, as a final product, the hydridodisilylstannane 12. The structures of (Z)‐10 and 12 were also determined by X‐ray crystallography.