Dinuclear and polynuclear dioxomolybdenum(VI) Schiff base complexes: Synthesis, structural elucidation, spectroscopic characterization, electrochemistry and catalytic property
作者:Ngui Khiong Ngan、Kong Mun Lo、Chee Seng Richard Wong
DOI:10.1016/j.poly.2011.11.057
日期:2012.2
dioxomolybdenum(VI) [(MoO2)L′(D-D)]n complexes were achieved by the reaction of the second type of dinuclear dioxomolybdenum(VI) complex, [(MoO2)2L′D2], with the bidentate ligand 4,4′-bipyridine (D-D). These complexes were characterized by elemental analysis, electronic spectra, IR, 1H and 13C NMR spectroscopies, thermogravimetric analysis and cyclic voltammetry. An X-ray study shows that each molybdenum site
已经合成了几种新的双核和多核二氧钼(VI)Schiff碱配合物。双(乙酰丙酮)二氧合钼的与5-dichlorosalicylaldehyde 4- ethylthiosemicarbazide(反应L1 / L2在4,4'-联吡啶(4,4'-联吡啶)或4,4'-联吡啶的存在下)Ñ,Ñ ' -二氧化碳(4,4'-dpdo)生成双核顺-二氧钼钼配合物[(MoO 2)2 L 2(DD)],其中双齿配体4,4'-联吡啶或4,4'-联吡啶N,N'-二氧化物(DD),在两个钼原子之间形成了一座桥梁。第二种双核二氧钼钼(VI)席夫碱配合物[(MoO 2)2 L'D 2 ]是通过双(乙酰丙酮基)二氧钼钼与1,4-双(3-乙氧基-水杨醛甲醛碳酰肼基)反应形成的乙醇或六甲基磷酰胺(D)存在下的丁烷(L ' )。在这种情况下,两个钼原子不直接由二齿配体桥接,而是在两端均与对称六齿席夫碱配体的O,N,O供体原子配位。多核二氧钼(VI)[(MoO