6533b82bfe1ef96bd128dfd0

RESEARCH PRODUCT

Synthesis and characterization of new allyl palladium complexes with thionate ligands; X-ray molecular structures of [Pd3(η3-C4H7)3{pm(Me)2S}2](CF3SO3) and [Pd{pm(Me)2S}2], η3-C4H7=η3-2-MeC3H4, pm(Me)2S=Pyridine-4,6-dimethyl-2-thionate

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Abstract The reaction of [Pd(η3-C4H7)]CF3SO3 (η3-C4H7=η3-2-MeC3H4) (1), prepared in situ by reaction of [Pd(η3-C4H7)Cl]2 with AgCF3SO3, with various thionate ligands, gives new polymeric complexes formulated as [Pd(η3-C4H7)(RS)]n (2) [RS=pyS (pyridine-2-thionate)], im(Me)S(imidazole-3-methyl-2-thionate) (3), pm(Me)2S (pyrimidine-4,6-dimethyl-2-thionate) (4). A solution of 4 contaminated with KCF3SO3 evolves to give crystals that correspond to a new polymeric species whose X-ray crystal molecular structure indicates the presence of cationic infinite chains built of trinuclear units, [Pd3(η3-C4H7)3{pm(Me)2S}2]+ (5). Finally, the formation of a mononuclear thionate-containing palladium complex [Pd{pm(Me)2S}2] (6) occurs from a solution of 5 after prolonged periods. An X-ray crystal structure determination indicates a square-planar disposition of two thionate ligands around the Pd atom. The different complexes were characterized by spectroscopic techniques.