Synthesis and characterization of palladium(II) and rhodium(I) complexes coordinated with bis (diphenylphosphinomethyl) sulfide

Abstract

Abstract Bis(chloromethyl) sulfide reacts with 2 moles of lithium diphenylphosphide in THF to give a white crystal, bis(diphenylphosphinomethyl) sulfide (dpms). This compound reacts with Na2[PdCl4] in ethanol to afford a monomeric complex, [PdCl2(dpms-P,P′)]. The compound, dpms, reacts with a half mole of [Rh2(μ-Cl)2(CO)4] to give a macrocyclic dinuclear complex, [RhCl(CO)(μ-dpms)2] (3). The dynamic property of 3 is investigated by means of temperature-dependent NMR spectroscopy. Treatment of 3 with a half mole of [Rh2(μCl)2(CO)4], followed by the addition of NaBPh4, gives a trinuclear complex, [Rh3(μ-Cl)Cl(CO)2(μ-dpms)2](BPh4)·H2O. When 3 is treated with AgClO4 and [Cu(CH3CN)4]ClO4, hetero-trinuclear complexes, M{Rh2Cl2(CO)2(μ-dpms)2}ClO4-(H2O)n M = Ag, n = 0; M = Cu, n = 1 respectively) are isolated as yellow powders.