Synthesis and Characterization of N-Methyl-Substituted Germocanes. Crystal Structure of MeN(CH₂CH₂O)₂GeBr₂

Abstract

The reaction of GeHal 4 with MeN(CH 2 CH 2 OSiMe 3 ) 2 affords dihalogermocanes MeN(CH 2 CH 2 O) 2 GeHal 2 (1, Hal = Br; 2, Hal = Cl). Treatment of Me 2 Ge(NMe 2 ) 2 with MeN(CH 2 CH 2 OH) 2 leads to dimethylgermocane MeN(CH 2 CH 2 O) 2 GeMe 2 (3). The composition and structure of 1-3 were established by elemental analyses, 1 H, 13 C NMR spectroscopy, and mass spectrometry. The crystal structure of 1 is reported; structural data obtained from geometry DFT optimization on 1 are in good agreement with experimental results. Values of the electron density in the N→Ge bond critical point and the Laplacian of charge density for 1-3 indicate a closed-shell interaction between the Ge and N atoms.