摘要:
Oxidation reactions of [Pt(PPh(3))4(]) with the two 1,3-diselenetanes, 2,2,4,4-tetraacetyl-1,3-diselenetane and 2,4-dibenzoyl-2,4-diacetyl-1,3-diselenetane, lead to dissection of the four-membered rings of the diselenetanes to give platinum(II) complexes containing the formally dianionic ligands: 2,4-pentanedione-3-selenolato (2-) and 1-phenyl-1,3-butanedione-3-selenolato(2-), respectively. The crystal structures of the complexes [Pt{SeC(COMe)=C(R)O}(PPh(3))(2)] (R = Me or Ph) reveal the five-memebered planar 2-oxa-5-selena-1-platinacyclo-3-pentene chelate ring systems with the chelating ligand bonded to platinum through the oxygen and selenium atoms.