N. W. Mitzel, P. Bissinger, H. Schmidbaur
Feb 1, 1993
Citations
0
Influential Citations
12
Citations
Journal
Chemische Berichte
Abstract
A series of (hydridosilyl)hydrazines 1 – 12 has been prepared from the corresponding chloro-or bromosilanes and hydrazines in the presence of triethylamine as an auxiliary base. Methylsilyl (MeH2Si-), dimethylsilyl (Me2HSi-), and phenylsilyl (PhH2Si-) groups have been introduced as substituents. NMR spectra (1H, 13C, 15N, 29Si) have been measured and used to determine the rotation barrier about the N — N bond in (PhH2Si)(Me2HSi)N — N(SiHMe2) (9), which has been found to be 75 kJmol–1. The crystal structure of (PhH2Si)2N — N(SiH2Ph2 (7) features each of the two NNSi2 groups as nearly planar, but with a dihedral angle close to orthogonal. Such a structure is also implied for 9 on the basis of the NMR spectra.