Abstract
Abstract Tetrakis[thiocyanatotri-n-butylphosphinecopper(I)] has been prepared by the reaction between copper(I) thiocyanate, potassium thiocyanate and tri-n-butylphosphine in water. The complex is noteworthy in that it contains rare examples of thiocyanates which are triply-bridged via their sulfur atoms. The existence of this bonding mode is supported by both 13C NMR and VCN IR spectral data. Dissolution in chloroform results in the partial dissociation of the tetramer to form a dimer involving normal N,S-bonded bridging thiocyanates, as well as a small amount of disproportionation to isothiocyanato-bis(tri-n-butylphosphine)copper(I) and copper(I) thiocyanate. Lowering the temperature of the solution enhances the extent to which the disproportionation reaction takes place.
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