Diacetylplatinum(II) and ‐platinum(IV) Complexes Bearing κ
<sup>2</sup>
‐ and κ
<sup>3</sup>
‐Coordinated Tris(pyrazolyl)methane Ligands: Investigations on the Synthesis, Fluxionality, and Reactivity in Relation to the Substitution Pattern of the Ligands
作者:Martin Bette、Jürgen Schmidt、Dirk Steinborn
DOI:10.1002/ejic.201201468
日期:2013.5
[Pt2(COMe)2H}2(μ-Cl)2] (1) with HC(pz)3 and HC(3,5-Me2pz)3 (pz = pyrazol-1-yl; 3,5-Me2pz = 3,5-dimethylpyrazol-1-yl) afforded cationic, thermally labile diacetyl(hydrido)platinum(IV) complexes [Pt(COMe)2H(pz)3CH}]Cl (3a) and [Pt(COMe)2H(3,5-Me2pz)3CH}]Cl (3b) with κ3-coordinated tris(pyrazolyl)methane ligands, which were found to react with NaOH or NEt3 to yield neutral diacetylplatinum(II) complexes with κ2-coordinated
双核铂-β-二酮 [Pt2(COMe)2H}2(μ-Cl)2] (1) 与 HC(pz)3 和 HC(3,5-Me2pz)3 的反应(pz = pyrazol-1 -yl; 3,5-Me2pz = 3,5-二甲基吡唑-1-yl) 提供阳离子、热不稳定的二乙酰(氢化)铂 (IV) 络合物 [Pt(COMe)2H(pz)3CH}]Cl (3a)和 [Pt(COMe)2H(3,5-Me2pz)3CH}]Cl (3b) 与 κ3 配位的三(吡唑基)甲烷配体,发现它们与 NaOH 或 NEt3 反应生成中性二乙酰铂(II)配合物具有κ2-配位的三(吡唑基)甲烷配体[Pt(COMe)2(pz)3CH}](4a);[Pt(COMe)2(3,5-Me2pz)3CH}] (4b)}。在 4a/b 中,发现了一种分子重排(吡唑基环的脱位和原始侧链的配位),已通过变温 1H NMR 光谱测量(聚结法)以及