Germanium, trimethyl-, compound with

The transmetalation of trimethylsilylphosphanes with germanium and tin halides is a useful way to prepare compounds with P—Ge and P—Sn bonds by simple chlorosilane elimination. The reverse reaction, i. e. formation of P—Si bonds by chlorosilane cleavage of germyl- and stannylphosphanes has not yet been reported. Recently, we observed that hexachlorodisilane "transsilylates di-r-butyl(trimethyl-silyl)phosphane 1 much faster than tetrachlorosilane to give trichlorosilylphosphane 2 ... 

The shortest Ge—H bond yet found in an organogermane occurs in the recently reported complex hydride [(CH3)3Si]2CH 2(OC2H5)GeH (118). The shortness of the Ge—H bond (1.46 A) must, at least in part, arise from the hybridization demands of the electronegative ethoxy group. Distortions in the tetrahedral environment about the germanium (Table I) arise from the steric requirements of the bis(trimethyl-silylmethyl) moieties, while the authors attribute to the same source the stability of this compound with respect to the reductive elimination of alcohol normally observed (127). 

Compounds like l,4,7-trimethyl-l,4,7-triazacyclononane (L ) and l,3,5-trimethyl-l,3,5-triazacyclohexane (L ) are useful ligands in germanium chemistry. Reactions of with GeCU and with GeBr4 both in the ratio 1 1 in acetonitrile solution form ionic compounds with GeX3+ cations [GeCl3(L )]Cl3 MeCN and [GeBr3(L )]Br3 MeCN. Acetonitrile is trapped in the lattice as solvate molecules. ... 

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