An Unsymmetrical Tripodal Ligand with an N2OS Donor Set: Coordination Chemistry with Nickel(II) Ions and Aerial Oxidation to the Sulfinate Complex
作者:Christian Ochs、F. Ekkehardt Hahn、Roland Fröhlich
DOI:10.1002/1521-3765(20000616)6:12<2193::aid-chem2193>3.0.co;2-a
日期:2000.6.16
The synthesis of the previously unknown tripodal ligand H4-1 is reported. The tetradentate ligand is equipped with a completely unsymmetrical N2OS donor set. It reacts with Ni(OAc)2. 4H2O or Ni(ClO4)2.6H2O to give the multinuclear nickel(II) complexes [Ni(H-1-Imin)(OAc)]2 (2) (which contains a coordinated Schiff base obtained by reation of the primary amine with the acetone solvent) and [Ni3(H3-1)(H2-1)2]-ClO4
报道了先前未知的三脚架配体H4-1的合成。四齿配体配备有完全不对称的N2OS供体。它与Ni(OAc)2反应。4H2O或Ni(ClO4)2.6H2O生成多核镍(II)络合物[Ni(H-1-Imin)(OAc)] 2(2)(其中包含通过伯胺与伯胺反应获得的配位席夫碱)丙酮溶剂)和[Ni3(H3-1)(H2-1)2] -ClO4.H2O.3 MeCN(3)。DMF中的3溶液在暴露于空气中或通过H2O2水溶液易氧化,生成[Ni(H2-1-亚磺酸盐)] 2。2MeOH(4)。2-4的分子结构已经通过X射线衍射确定。配合物2在每个镍(II)离子周围呈现出严重扭曲的八面体配位几何形状。在这种情况下,配体的伯氨基与溶剂丙酮反应,生成与金属中心配位的席夫碱。3中的三核络合物阳离子的分子结构由两个亚基组成:一个具有N2S2呈正方形平面配位几何结构的镍原子和另一个具有三角-双锥体N2O2S配位环境的镍原子。双核