Title

Addition Compounds of Phosphorus(V) Chloride and Aromatic Nitrogen Bases. Crystal Structure and 1H NMR and Raman Spectra of Pyrazine-Phosphorus(V) Chloride

Document Type

Article

Publication Date

1980

Publication Source

Inorganic Chemistry

Abstract

The solid-state structure of a nonionic adduct of phosphorus(V) chloride and pyrazine, C4H4N2-PCI5, shows phosphorus to be six-coordinate with one octahedral position occupied by a nitrogen atom of the pyrazine ring. The monoclinic crystal is of space group C2/c having four molecules per unit cell of dimensions a = 8.359 (8) A, b = 16.202 (15) A, c = 7.568 (7) A, and p = 99.37 (7)'. The structure was refined by least squares to R = 0.097 by using 1754 independent reflections collected to 28, = 65" and corrected for absorption. The P-N distance is 2.021 (5) A. In nitromethane solution, Raman, 'H NMR, cryoscopic, and conductivity measurements are interpreted in terms of equilibria involving CIH4N2.PCIS, pyrazine, molecular PCI,, and ions originating from the ionization of PCls and C4H4N2.PClS.

Inclusive pages

2324-2327

ISBN/ISSN

0020-1669

Publisher

American Chemical Society

Volume

19

Issue

8

Peer Reviewed

yes