Abstract
Two new bidentate phosphine dichalcogenide ligands of the type MeN(Pip2PE)2 [(Pip=piperidinyl; E=S (1) or Se (2)] and their cadmium(II) and mercury(II) chloride complexes MCl2{MeN(Pip2PE)2} [M=Cd; E=S (3); Se (4) or M=Hg; L=S (5); Se (6)] were prepared and characterized by elemental analysis, IR, multinuclear (31P, 77Se and 113Cd) NMR spectroscopy and single crystal X-ray analyses. Ligands 1and2 were found to adopt anti conformation structures in the solid state, in which both PE groups are trans to each other. Complexes 3–6 are comprised of one ligand coordinated in a bidentate fashion to the metal centre in a distorted tetrahedral arrangement [98.46(3)–121.24(4)°]. The PS bond lengths of 1.999(15)–2.003(14)Å in complex 3 are slightly elongated compared to those in the free ligand [1.933(15)–1.950(14)Å]. The results are discussed and compared with closely related analogues.
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