Structural, Spectroscopic, and Theoretical Characterization of Bis(μ-oxo)dicopper Complexes, Novel Intermediates in Copper-Mediated Dioxygen Activation
作者:Samiran Mahapatra、Jason A. Halfen、Elizabeth C. Wilkinson、Gaofeng Pan、Xuedong Wang、Victor G. Young、Christopher J. Cramer、Lawrence Que,、William B. Tolman
DOI:10.1021/ja962305c
日期:1996.1.1
of the [Cu2(μ-O)2]2+ core was defined by X-ray crystallography for [(d21-LBn3Cu)2(μ-O)2](SbF6)2 and by EXAFS spectroscopy for the complexes capped by LBn3 and LiPr3; notable dimensions include short Cu−O (∼1.80 A) and Cu···Cu (∼2.80 A) distances like those reported for analogous M2(μ-O)2 (M = Fe or Mn) rhombs. The core geometry is contracted compared to those of the bis(μ-hydroxo)dicopper(II) compounds
对新型双(μ-氧代)二铜配合物及其双(μ-羟基)二铜分解产物的结构和键合的描述来自结合 X 射线晶体学、光谱学和从头算理论研究。化合物 [(LCu)2(μ-O)2]X2 是由 [LCu(CH3CN)]X 的溶液在 -80 °C 下与 O2 反应生成的(L = 1,4,7-tribenzyl-1, 4,7-三氮杂环壬烷,LBn3;1,4,7-三异丙基-1,4,7-三氮杂环壬烷,LiPr3;或 1-苄基-4,7-二异丙基-1,4,7-三氮杂环壬烷,LiPr2Bn;X = 品种阴离子)。[Cu2(μ-O)2]2+ 核的几何形状由 [(d21-LBn3Cu)2(μ-O)2](SbF6)2 的 X 射线晶体学和封端配合物的 EXAFS 光谱学定义通过 LBn3 和 LiPr3;值得注意的尺寸包括短 Cu-O (∼1.80 A) 和 Cu…Cu (∼2. 80 A) 距离,类似于对类似 M2(μ-O)2