Novel platinum (II) complexes with (pyridyloxymethylene)dimethylphosphine oxides-synthesis, IR and Raman study.: Normal coordinate analysis

Abstract

The synthesis and spectroscopic properties of novel platinum (II) halide complexes with (4-pyridyloxymethylene)dimethylphosphine oxide (p-tpo) and (3-pyridyloxymethylene)dimethylphosphine oxide (m-tpo) are reported. The vibrational (IR and Raman) and physical data are in agreement with suggested stoicheiometry ML2Cl2 (L=p-tpo and m-tpo) and cis-square planar PtN2Cl2 configuration. Both p-tpo and m-tpo act as monodentate ligands and coordinate through the pyridyloxymethylene ring nitrogen to the metal ion. IR and Raman spectra exhibit no shift to lower frequencies of the ν(PO) and thus provide unambiguous evidence for a free PO oxygen. Normal coordinate analysis (NCA) calculations of both ligands confirm the monodentate coordination of the ligands.