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• W2009493896 startingPage "681" @default.
• W2009493896 abstract "The molecular structures of dimethyltrifluorophosphorane, (CH3)2PF3 and trimethyldifluorophosphorane, (CH3)3PF2, have been investigated by analysing the vapour-state infra-red spectra (200–4000 cm−1) and liquid state Raman spectra (50–3100 cm−1). Of these two compounds the difluorophosphorane has not previously been described in any detail; a convenient mode of preparation is indicated together with some physical properties of the compound (including 1H, 19F and 31P N.M.R. data). Both the trifluorophosphorane and difluorophosphorane molecules appear to have a trigonal bipyramidal framework. The spectra of (CH3)2PF3 are best interpreted in terms of a C2v structure in which the fluorine atoms occupy one equatorial and the two axial sites, whereas the corresponding evidence for (CH3)3PF2 strongly supports a symmetrical molecule with D3h symmetry wherein the methyl groups are all in equatorial positions and the fluorine atoms in axial positions. Attention is focussed on some significant spectroscopic and stereochemical trends in the series PF5, CH3PF4, (CH3)2PF3, (CH3)3PF2." @default.
• W2009493896 created "2016-06-24" @default.
• W2009493896 creator A5041824234 @default.
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• W2009493896 date "1967-03-01" @default.
• W2009493896 modified "2023-10-14" @default.
• W2009493896 title "Stereochemistry of fluorophosphoranes—II The vibrational spectra and molecular structures of dimethyltrifluorophosphorane (CH3)2PF3 and trimethyldifluorophosphorane, (CH3)3PF2" @default.
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• W2009493896 doi "https://doi.org/10.1016/0584-8539(67)80323-4" @default.
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