The d<sup>3</sup>/d<sup>2</sup>alkyne complexes [MX<sub>2</sub>(η-RCCR)Tp′]<sup>z</sup>(X = halide, z = 0 and 1+): final links in a d<sup>6</sup>–d<sup>2</sup>redox family tree
作者:Christopher J. Adams、Kirsty M. Anderson、Neil G. Connelly、David J. Harding、Owen D. Hayward、A. Guy Orpen、Elena Patrón、Philip H. Rieger
DOI:10.1039/b813642d
日期:——
complexes [MX(CO)(η-RCCR)Tp′] R = Me, M = W, X = F; R = Ph, M = Mo or W, X = F or Cl; Tp′ = hydrotris(3,5-dimethylpyrazolyl)borate} undergo two-electron oxidation in the presence of a halide source to give the d2 monocations [MX1X2(η-PhCCPh)Tp′]+ (R = Me, M = W, X1 = X2 = F; R = Ph, M = Mo, X1 = X2 = F or Cl; M = W, X1 = X2 = F or Cl; X1 = F, X2 = Cl). Each monocation (R = Ph) shows two reversible
d 4个卤化物配合物[MX(CO)(η-RCCR )Tp'] R = Me,M = W,X = F;R = Ph,M = Mo或W,X = F或Cl;Tp'=氢三(3,5-二甲基吡唑基)硼酸酯}经历两电子氧化作用 在一个 卤化物给出d 2单阳离子[MX 1 X 2(η- PhCCPh)Tp'] +(R = Me,M = W,X 1 = X 2 = F; R = Ph,M = Mo,X 1 = X 2= F或Cl; M = W,X 1= X 2= F或Cl; X 1= F,X 2= Cl。每个单阳离子(R = Ph)均显示两个可逆的单电子还原(R = Me未检测到第二个过程),对应于逐步形成中性d 3和单阴离子d 4类似物[MX 1 X 2(η- PhC CPh)Tp']和[MX1 X 2(η-PhCCPh)Tp'] -;这两个过程的电势可以在大约ca的范围内“调节”。通过改变M和X达到1