17.5H2O were determined by X-ray diffraction. The complexes show unexpected geometries forming dinuclear and cubane-like structures, respectively. The dinuclear copper(II) complexcontains a bridging μ2-alcoholate group with the −O–P(O)–CH2–NH2 fragments of each ligand molecule chelated to the different central ion. In the cubane cobalt(II) complex, one μ3-hydroxide and three μ3-alcoholate anions are
在中心碳原子上带有不同取代基的三个对称的亚甲基双[(氨基甲基)次膦酸],(NH 2 CH 2)PO 2 H–C(R 1)(R 2)–PO 2 H(CH 2 NH 2)其中R 1 = OH,R 2 = Me(H 2 L 1 111),R 1 = OH,R 2 = Ph(H 2 L 2 222)和R 1,R 2 = H(H 2 L 3 3333),进行了合成。在溶液以及固态下都研究了配体的酸碱和络合特性。与简单的(氨基甲基)次膦酸相比,配体显示出异常高的氮原子碱性(log K 1 = 9.5–10,log K 2 = 8.5–9),因此,具有研究过的二价金属的配合物具有很高的稳定性常数离子。研究表明,羟基与双(次膦酸酯)双键的中心碳原子相连。羟基的去质子化产生醇化物阴离子,其倾向于起桥连配体的作用并诱导多核络合物的形成。配合物的固态结构[H 2 N C(NH 2)2 ] [Cu 2(H -1 L