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