Abstract
The interaction of palladium(+1) cluster Pd 4(μ-CO) 4(μ-OAc) 4 with saturated and unsaturated carboxylic acids was studied. It was found, that the substitution of acetates groups on others carboxylates leads to the clusters with different nuclearity. Palladium(+1) carbonyl carboxylate complexes of composition [Pd(μ-CO)(μ-OCOR)] n , where R = CF 3, CCl 3, CH 2Cl, MeCH = CMe, Me, Pr i , Bu, Bu i , Bu tert , n-C 5H 11 and n = 4 or 6 were synthesized. According to X-ray data all clusters possess cyclic planar metal cores with alternate pairs of μ-carbonyl and μ-carboxylate ligands. The presence of bulky alkyl fragments in the carboxylate ligand increases the nuclearity of the cluster compared to that of the starting palladium(+1) carbonyl acetate of composition Pd 4(μ-CO) 4(μ-OAc) 4 due, apparently, to steric hindrance.
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