Coordination of silicon tetrafluoride with pyridine and other nitrogen electron-pair donor molecules
- 15 April 1969
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 47 (8) , 1275-1279
- https://doi.org/10.1139/v69-212
Abstract
Silicon tetrafluoride reacts with pyridine, pyrrolidine, and piperidine forming solid 1:2 complexes. With ethylenediamine, the stable 1:1 complex results. These compounds are easily hydrolyzed and sublimed and have no measurable vapor pressure at 25°. Hydrolysis of SiF4•2C5H5N with aqueous HF produces pyridinium hexafluorosilicate (4), (C5H5NH+)2SiF62−. Ethylenediamine readily displaces pyridine from SiF4•2C5H5N, forming SiF4•NH2(CH2)2NH2. Infrared spectra of the complexes are compared in the 900–280 cm−1 region, but it was not possible to decide whether the pyrrolidine and piperidine complexes are cis- or trans-octahedral.Keywords
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