Dinuclear Cycloaurated Complexes Containing Bridging (2-Diphenylphosphino)phenylphosphine and (2-Diethylphosphino)phenylphosphine, C<sub>6</sub>H<sub>4</sub>PR<sub>2</sub> (R = Ph, Et). Carbon−Carbon Bond Formation by Reductive Elimination at a Gold(II)−Gold(II) Center
作者:Martin A. Bennett、Suresh K. Bhargava、David C. R. Hockless、Lee L. Welling、Anthony C. Willis
DOI:10.1021/ja961511h
日期:1996.1.1
The digold(I) complexes Au2(μ-C6H4PR2)2 [R = Ph (1a), Et (1b)] obtained by treatment of AuBr(PEt3) with o-LiC6H4PR2 undergo addition with halogens or benzoyl peroxide to give metal−metal bonded digold(II) complexes Au2X2(μ-C6H4PR2)2 [R = Ph, Et; X = I (2a, 2b), Br (3a, 3b), Cl (4a, 4b), O2CPh (5a, 5b)], which are structurally similar to the bis(ylide) complexes Au2X2μ-(CH2)2PR2}2. The benzoate ligands
通过用 o-LiC6H4PR2 处理 AuBr(PEt3) 获得的二金 (I) 络合物 Au2(μ-C6H4PR2)2 [R = Ph (1a), Et (1b)] 与卤素或过氧化苯甲酰加成得到金属-金属键合二金 (II) 配合物 Au2X2(μ-C6H4PR2)2 [R = Ph, Et; X = I (2a, 2b), Br (3a, 3b), Cl (4a, 4b), O2CPh (5a, 5b)],它们在结构上类似于双(叶立德)配合物 Au2X2μ-(CH2)2PR2 }2. 5b 中的苯甲酸酯配体是单齿的,金-金键长 [2.5243(7) A] 显着小于二碘化物 (2a) [2.5898(6) A, 2.5960 (A) 对于独立分子],反映了轴向阴离子配体的反式影响。相应的配合物 Au2X2(μ-C6H4PR2)2 [R = Ph, Et; X = O2CMe (6a, 6b)