Complexes of hydrophilic triphenylphosphines modified with gem-bis(phosphonate) moiety. An unusual simultaneous cis and trans arrangements in the Pt(ii) dinuclear complex
作者:Bohuslav Drahoš、Zbyněk Rohlík、Jan Kotek、Ivana Císařová、Petr Hermann
DOI:10.1039/b818259k
日期:——
purified through their borane adducts. The X-ray structure of 2b x 2BH3 x H2O was determined. Coordination properties of new ligands towards Rh(I), Pd(II) and Pt(II) ions were studied. 1H, 31P and 195Pt NMR spectroscopy showed that ligands 2a and 3a form the expected [RhCl(eta2:eta2-cod)(L)] (cod = cycloocta-1,5-diene) and [MCl2(L)2] (M = Pd, Pt) complexes. The compounds 2b and 3b behave as bridging bidentate
以乙基酯,[4-(二苯基膦酰基)苄基]亚甲基-双(膦酸酯)(2a)和八乙基双[4-(二苯基膦酰基)苄基]亚甲基-的形式被双-(膦酸酯)部分取代的新的三苯基膦-通过多步合成制备双(膦酸酯)(2b)以及相应的游离酸3a和3b,并通过多核NMR光谱和质谱进行表征。酯配体2a和2b通过它们的硼烷加合物方便地纯化。测定了2b×2BH3×H2O的X射线结构。研究了新配体对Rh(I),Pd(II)和Pt(II)离子的配位性能。1H,31P和195Pt NMR光谱表明,配体2a和3a形成了预期的[RhCl(eta2:eta2-cod)(L)](cod =环辛-1,5-二烯)和[MCl2(L)2](M = Pd,Pt)络合物。化合物2b和3b充当桥接二齿配体,形成[RhCl(eta2:eta2-cod)] 2(mu-L-kappa2P,P')}和[M2Cl4(mu-L-kappa2P,P' )2](M =