The preparation of new pentacoordinate silicon complexes 4-6 from polychloro-or fluoro-silanes and O-silylated-NJ-dimethylhydrazides is described, along with a typical trigonal-bipyramidal (TBP) crystal structure. Evidence is presented that 4-6 undergo rapid N→Si dissociation-recombination. Coupling constants are reported extending across the dative bond, even at temperatures in which N-Si dissociation is rapid. A Karplus-type correlation between dihedral angles and vicinal coupling constants is shown.
|Title of host publication||Organosilicon Chemistry Set|
|Subtitle of host publication||From Molecules to Materials|
|Number of pages||6|
|State||Published - 1 Jan 2005|
- Multinuclear NMR
- Pentacoordinate silicon