intermediate. In turn, this complex is reduced either at the electrode surface (X = Cl) or in a homogeneous chemical reaction (X = Br) to form trans-[Mn(CO)2(κ2-dpm)(κ2-P-P)]+, which is the final product observed under conditions of bulk electrolysis. In contrast, the first oxidation step for the corresponding rhenium complexes involves oxidation of the pendant phosphorus atom and reaction with traces of water
广泛的一系列的电
化学氧化顺式,聚体-M(CO)2(κ 1 -dPM)(κ 2 -PP)X(M =
锰中,Re; DPM =苯基2 PCH 2 PPH 2 ; PP = DPM, Ph 2 PCH 2 CH 2 PPh 2(dpe),o-(Ph 2 P)2 C 6 H 4(dpbz); X = Cl,Br)络合物已在伏安法和本体电解时间尺度上进行了研究。在短时域或低温下,
锰配合物经历可逆的单电子氧化成顺式,二聚体- [
锰(CO)2(κ 1 -dPM)(κ 2 -PP)X] +。慢扫描速率伏安条件下这些化合物异构化在室温下,得到的反式- [
锰(CO)2(κ 1 -dPM)(κ 2 -PP)X] +,其在甚至更长的本体电解时间尺度慢慢失去X -以形成反应性的反式- [
锰(CO)2(κ 2 -dPM)(κ 2 -PP)] 2+中间体。反过来,该络合物在电极表面(X = Cl)或在均相
化学反应(X =