Cyclische Diazastannylene. - XXXII : Zur Synthese und Reaktivitat difunktionalisierter Cyclosilagermadiazane - Bildung von Digermanen

Abstract

The cyclic bisaminostannylene Me2Si(t-BuN)2Sn 1 reacts with tetrahalides of germanium GeX4 (X = Cl, Br, I) forming the bisaminodihalogengermanes 2a, 2b and 2c. The halogen atoms of the compounds 2 may be substituted by alkyl-, amino- and pseudohalide groups: Me2Si(t-BuN)2GeXY (X = Y = N3 3; X = Br, Y = Me 4, Y = t-Bu 6, Y = N(SiMe3)2 8a, Y = NEt2 9; X = Me, Y = N3 5a, Y = CN 5b; X = N3, Y = t-Bu 7, Y = N(SiMe3)2 10; X = I, Y = N(SiMe3)2 8b). Reduction of the compounds 2 b and 4 with sodium naphthalide generates the digermanes (Me2Si(t-BuN)2GeR)2 (with R = Br 11, R = Me 12). Compound 8 b crystallizes in the monoclinic space group P2(1)/c with Z = 8 and lattice constants a = 16.205(8), b = 19.854(9), c = 17.537(9) angstrom, beta = 107.50(9)-degrees. Compound 11 crystallizes in the triclinic space group P1BAR with Z = 2 and lattice constants a = 8.921(4), b = 11.091(5), c = 17.590(8) angstrom, alpha = 80.5(1), beta = 89.2(1), gamma = 71.4(1)-degrees.