Axial ligand substitution reactions of head-to-head alpha-pyridonato-bridged Pt(III) binuclear complexes bearing various equatorial ligands with chloride ion and olefin

作者：Kusuhara Shintaro; Kojima Kaori; Suzuki Yota; Morita Yuki; Sugaya Tomoaki; Iwatsuki Satoshi; Ishihara Koji^*; Matsumoto Kazuko^*

来源：Journal of Molecular Liquids, 2018, 262: 556-564.

DOI：10.1016/j.molliq.2018.04.024

In this study, axial ligand-substitution reactions of head-to-head (HH) alpha-pyridonato-bridged platinum(III) binuclear complexes bearing equatorial amine ligands (L = MeNH2, EtNH2, and L-L = ethylenediamine (en), and N,N'-dimethylethylenediamine (Me(2)en)) [(Cl)(NH3)(2)Pt(mu-alpha-pyridonato)(2)Pt(L)(2)(Cl)(2+) are synthesized, and the axial ligand substitution on these complexes with chloride ions are kinetically investigated in acidic aqueous solution. For these complexes, the formation reactions of the dichloro complexes from the monochloro complexes proceeded through three parallel reaction pathways, in contrast to those for the HH tetraammine amidato-bridged platinum (III) binuclear complexes. The effects of equatorial amine ligands as well as the bridging ligands on the axial ligand substitution are discussed. The reaction of [(H2O)(NH3)(2)Pt(mu-alpha-pyridonato)(2)Pt (en)(OH2)](2+) with p-styrenesulfonate is also kinetically investigated.

• 出版日期2018-7-15