Bonding in d10 transition metal complexes. III. Infrared, Raman and N.Q.R. studies of some trimethylphosphine sulphide and trimethylarsine sulphide copper(I) complexes

1 January 1975

journal article
Published by CSIRO Publishing in Australian Journal of Chemistry

Vol. 28 (7)
https://doi.org/10.1071/ch9751431

Abstract

The infrared, Raman and n.q.r. (63Cu, 65Cu) spectra of tris(trimethylphosphine sulphide)copper(I) perchlorate, [Cu(Me3PS)3] ClO4, cyclo-tris-μ(trimethylphosphine sulphide)-tri(chlorocopper(I)), (Me3PSCuCl)3, the trimethylarsine sulphide compounds [Cu(Me3AsS)3] ClO4, (Me3AsSCuCl)n (n = an integer), and the bromo and iodo compounds (Me3PSCuBr)n, (Me3PSCuI)n have been studied with the aim of finding out more about the structure and bonding in these complexes. The infrared and Raman spectra indicate that the trimethylarsine sulphide compounds are probably isostructural with the corresponding trimethylphosphine sulphide compounds. The origin of the electric field gradient responsible for the copper nuclear quadrupole coupling in these compounds is discussed, and it is shown that the copper n.q.r. results can be explained in terms of a bonding scheme involving 3d-4s orbital mixing.

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