Distortion of the coordination polyhedron in mononuclear copper(II) complexes. Optical absorption and electron spin resonance studies on some five-coordinate copper(II) complexes
作者:Raghuvir Singh、L.V.K.N.Ramlingeswara Rao
DOI:10.1016/s0277-5387(00)88042-0
日期:1984.1
spectral methods. Electron spin resonance spectral data show the square-pyramidal five-coordinated arrangement around copper(II) in these complexes. Parameters such as g ‖ , g ⊥ , A ‖ , A ⊥ , 〈 g 〉 and 〈 A 〉 calculated from electron spin resonance data in solid and solution state at room temperature as well as frozen solution indicate the presence of the unpaired electron in the d x 2 − y 2 or d z 2 orbital
摘要报道了一系列十种[Cu(A)(B)n](X)形式的混合配体铜(II)配合物的制备和光谱性质,其中A为乙酰丙酮根阴离子,B表示单-或-二齿配体,例如吗啉,哌啶,异烟酸酰肼,2,2'-联吡啶,1,10-菲咯啉和X分别为NO-3或ClO-4阴离子,n = 1或2。阴离子和配体的配位已经通过红外和电子光谱方法得到了证明。电子自旋共振谱数据显示这些络合物中铜(II)周围的四棱锥金字塔形的五配位排列。参数,例如g‖,g⊥,A‖,A⊥,根据在室温下固态和溶液状态下的电子自旋共振数据以及冷冻溶液计算出的< g>和< A>表明在dx 2 -y 2或dz 2轨道中存在不成对的电子。这些结果与电子和光声光谱研究非常吻合。