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Abstract
Oxidative addition of chloromethyl methyl sulfide to Pd(Ph 3P) 4 provided a good yield of Pd(Ph 3P) 2(CH 2SCH 3)Cl (I) whose 1H NMR and molecular weight data showed that dissociation of either the phosphine or the chloride ligand occurs in CH 2Cl 2 solution. In accord with such equilibria, repeated crystallization of I from CH 2Cl 2 and Et 2O gradually removed the triphenylphosphine set free in these solvents to give the monomeric complex. Pd(Ph 3P)(CH 2SCH 3)Cl (III), while treatment of 1 with NH 4PF 6 in CH 2Cl 2 and acetone gave the cationic complex [Pd(Ph 3P) 2(CH 2SCH 3]PF 6 (II), 1H NMR spectra of II and III are discussed in terms of a three-membered chelate structure arising from coordination of sulfur with palladium
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