Dioxomolybdenum(VI) and oxotungsten(VI) complexes with a new amine bisphenol ligand (H2L) are reported. The ligand which carries a neutral nitrogen atom, two phenolic oxygen atoms and a thiophene side-arm was synthesized by a simple one-pot Mannich reaction. Further reaction with [MoO2(acac)2] yielded a monomeric molybdenum complex [MoO2(L)(MeOH)] (2a) or a dimeric complex [Mo2O2(μ-O)2(L)2] (2b), depending on the reaction conditions. The reaction with a tungsten trisglycolate [W(eg)3] led to the formation of a monomeric compound [WO(eg)(L)] (3). In these complexes, the potentially tetradentate amine bisphenolate dianion coordinates as a tridentate O,N,O donor while the sulfur side-arm donor remains intact. The solid-state structure of 2a was investigated by X-ray crystallography.
报道了一种新的胺双酚配体(H2L)与二氧化钼(VI)和氧化钨(VI)形成的配合物。该配体带有一个中性氮原子、两个酚氧原子和一个噻吩侧臂,通过简单的一锅曼尼希反应合成。进一步与[MoO2(acac)2]反应,形成单核钼配合物[MoO2(L)(MeOH)] (2a)或双核配合物[Mo2O2(μ-O)2(L)2] (2b),取决于反应条件。与三羟基乙二醇钨反应,形成单核化合物[WO(eg)(L)] (3)。在这些配合物中,潜在四齿胺双酚酸二阴离子以三齿O,N,O供体的形式配位,而硫侧臂供体保持完整。通过X射线晶体学研究了2a的固态结构。