Synthesis and Structure of a Manxane-Cage Silazane Molecule

Michael Baier, Peter Bissinger, Hubert Schmidbaur

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Abstract

The reaction of tris(chlorodimethylsilyl)methane HC(SiMe2Cl)3 (1) with dry ammonia in hexane leads to the tris(disilazane) molecule HC(Me2SiNHSiMe2)3CH (3) in satisfactory yields. According to its 1H, 13C, and 29Si NMR spectra this bicyclic cage-molecule exhibits virtual (time-averaged) D3h symmetry. In the crystal (rhombohedral, space group R 3¯) the manxane-type structure has a crystallographic three-fold axis, but the structure obeys only D3d symmetry to a good approximation, owing to a disrotatory twist of the two Si3 triangles against each other. The crystals of compound 3 are isomorphous with those of the analogous tris(disiloxane) 2.

Original languageEnglish
Pages (from-to)1672-1674
Number of pages3
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume48
Issue number11
DOIs
StatePublished - 1 Nov 1993

Keywords

  • Cage-Type
  • Silazanes
  • Silicon-Nitrogen Compounds

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