Cr–NC-Fe complexes. Upon oxidation the v(CN) band of the complexes shifts to lower wavenumbers and becomes much more intense. The oxidized complexes show the paramagnetism due to one unpaired electron. They give rise to very intense metal-to metal charge-transfer bands in the near infrared region whose position was found to be characteristically dependent on solvent polarity of [(CO)5Cr–CN–Fe(dppe)Cp]BF4
21个新的M–Cn–M'类型的有机
金属配合物,包含结构单元M,M'=(CO)5 Cr,(CO)5 Mo,(CO)5 W,Cp(CO)2 Mn,Cp(CO )2 Fe,Cp(CO)(CN)Fe,Cp(dppe)Fe,Cp(PPh 3)2 Ru,Cp(PPh 3)Ni和(PPh 3)2 Ag从试剂M–Cn和MX(X =离开组)。其中有五对键合异构体M–CN–M'/ M–NC-M'。(CO)5 Cr–CN–M'的结构测定,其中M'= Fe(dppe)Cp,Ni(PPh 3)Cp,Ag(PPh 3)2和(CO)5Cr-NC-Fe(dppe)Cp证明了它们的身份和连接异构性。v(CN)和v(CO)IR波段的系统变化可以评估构件M和M'的相对电子对受体强度,并可以可靠地鉴定各个键的异构体。所有的双核络合物都是氧化还原活性的,至少显示出一种可逆的氧化作用。的氧化还原电势的特点是依赖于积木M和M'和性质在