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- W2012189188 abstract "Complex formation between the tetrachlorophosphonium ion, usually in the form of [PCl4][SbCl6], and some pyridine bases has been investigated in solution by means of 31 P n.m.r. spectroscopy. Bidentate pyridines L′ form stable 1 : 1 ionic complexes [PCl4L′][SbCl6]. Sufficiently basic and sterically unhindered unidentate pyridines L form 2 : 1 complexes [PCl4L2][SbCl6], but these take part in a solution equilibrium with the molecular species PCl5·L and SbCl5·L. Unusual behaviour was observed with 3-cyano- and 2-cyano-pyridine, the latter probably forming both ionic and molecular complexes co-ordinated via the cyano-group. 2-Substituted methylpyridines undergo halogenation, with simultaneous formatjon of PCl3. Very weak or sterically hindered bases other than 2-cyanopyridine appear not to take part in complex formation. Several of the complexes have been isolated as solids, in which state they are comparatively stable, sometimes showing remarkable resistance to hydrolysis. The structures have been confirmed by analysis and 31P n.m.r., i.r., and 35Cl n.q.r. spectroscopy. A cis configuration is suggested for some of the [PCl4L2]+ ions from the n.q.r. data, although the structure of the pyridine complex itself remains uncertain." @default.
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- W2012189188 date "1977-01-01" @default.
- W2012189188 modified "2023-10-17" @default.
- W2012189188 title "Pyridine-base complexes of the tetrachlorophosphonium ion" @default.
- W2012189188 doi "https://doi.org/10.1039/dt9770002382" @default.
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