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Preparation of a zwitterionic trichloroplatinum(II) complex with an alkylbipyridinum ligand and its reaction in dmso-d 6 solution

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Abstract

A zwitterionic trichloroplatinum(II) complex PtCl3(4,4′-bpy-N-nBu) (1) was prepared by an aqueous reaction of [4,4′-bpy-N-nBu]Cl with K2PtCl4, and was characterized by 1H-n.m.r. and IR spectroscopy as well as elemental analysis. Dissolving (1) into dmso-d 6 at 25 °C yields a mixture of the complexes, cis-PtCl2(4,4′-bpy-N-nBu)(dmso-d 6) (2-cis), trans-PtCl2(4,4′-bpy-N-nBu)(dmso-d 6) (2-trans), [4,4′-bpy-N-nBu]Cl and PtCl2(dmso-d 6)2. Ratio of the products in the dmso-d 6 solution changed depending on the temperature and the total concentration of the complexes. These compounds are in equilibrium via isomerization reaction between (2-cis) and (2-trans) and via displacement reaction of the alkylbipyridinium ligand of (2-cis) and (2-trans) with dmso-d 6 to form [4,4′-bpy-N-nBu]Cl and PtCl2(dmso-d 6)2.

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  1. Chemical Resources Laboratory (Mail Box R1-3), Tokyo Institute of Technology, 4259 Nagatduta, Midori-ku, Yokohama, 226-8503, Japan

    Yuji Suzaki, Toshiaki Taira & Kohtaro Osakada

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  1. Yuji Suzaki
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  2. Toshiaki Taira
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  3. Kohtaro Osakada
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Correspondence to Kohtaro Osakada.

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Suzaki, Y., Taira, T. & Osakada, K. Preparation of a zwitterionic trichloroplatinum(II) complex with an alkylbipyridinum ligand and its reaction in dmso-d 6 solution. Transition Met Chem 32, 753–756 (2007). https://doi.org/10.1007/s11243-007-0235-1

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  • DOI: https://doi.org/10.1007/s11243-007-0235-1

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