Synthesis of a novel non-symmetric Pd(II) phosphinito–thiophosphinito PSCOP pincer compound

The reaction of 3-mercaptophenol with diphenylchlorophosphine in a 1:2 ratio in the presence of NEt3 as base, affords cleanly the non-symmetric ligand [C6H4-1-(SPPh2)-3-(OPPh2)] (1). The direct reaction of this ligand with PdCl2 in refluxing toluene affords the non-symmetric phosphinito–thiophosphinito PSCOP pincer complex [PdCl{C6H3-2-(SPPh2)-6-(OPPh2)}] (2).