Neutral and cationic monocarbonyl derivatives of palladium(II). X-ray crystal structure of [Pd(8-mq)(CO)(SPPh3)]ClO4

Article abstract of DOI:10.1016/S0277-5387(96)00533-5

Carbonylation of [Pd(8-mq)(OCMe₂)_x]ClO₄ (8-mq = 8-quinolylmethyl-C,N) in CH₂Cl₂/Me₂CO at low temperature gave [Pd(8-mq)(OClO₃)(CO)]. Reactions of [Pd(8-mq)(OClO₃)(CO)] with anionic (Cl^-, Bi^-, I^-) or neutral (SPPh₃, SPMe₂Ph) nucleophiles in a 1 : 1 molar ratio resulted in the displacement of the weakly coordinated OClO₃^- group and the formation of the corresponding neutral [Pd(8-mq)(X)(CO)] (X = Cl, Br, I) or cationic [Pd(8-mq)(CO)L]ClO₄ (L = SPPh₃, SPMe₂Ph) carbonyl complexes. The cationic complexes, [Pd(8-mq)(CO)L]ClO₄, were synthesized by the reaction of [Pd(8-mq)(OCIO₃)(SPPh₃)] or [Pd(8-mq)(μ-SPMe₂Ph)]₂(ClO₄)₂ with CO. The X-ray structure of a cationic palladium carbonyl derivative, [Pd(8-mq) (CO)(SPPh₃)]ClO₄, is reported.