Synthesis and Structure of (Hydridosilyl)hydrazines

Norbert W. Mitzel, Peter Bissinger, Hubert Schmidbaur

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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.

Original languageEnglish
Pages (from-to)345-350
Number of pages6
JournalChemische Berichte
Issue number2
StatePublished - Feb 1993
Externally publishedYes


  • (Hydridosilyl)hydrazines
  • Silicon nitride


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