Synthesis and crystal structure of a new water-soluble sulfur-containing palladacyclic diaqua complex

A new water-soluble sulfur-containing palladacyclic diaqua complex [(SC)PdII(H2O)2]2(SO4) {[1]2(SO4), SC = C6H4-2-(CH2StBu)} was synthesized from a reaction of Ag2SO4 with a water-insoluble palladacyclic dichloro complex [(SC)PdII(μ-Cl)]2 (2) in water. Water-solubility of [1]2(SO4) at pH 7 at 25 °C is 9.4 mg/mL. NH4PF6 was added to the solution of [1]2(SO4) in water to give [1](PF6). The structures of [1](PF6) and 2 were unequivocally determined by X-ray analysis.