Synthesis and Electrochemical Studies of Cobalt(III) Monohydride Complexes Containing Pendant Amines
作者:Eric S. Wiedner、John A. S. Roberts、William G. Dougherty、W. Scott Kassel、Daniel L. DuBois、R. Morris Bullock
DOI:10.1021/ic401232g
日期:2013.9.3
CoI complex [CoI(L2)(CH3CN)]+. Under voltammetric conditions, the reduced cobalt hydride reacts with a protic solvent impurity to generate H2 in a monometallic process involving two electrons per cobalt. In contrast, under bulk electrolysis conditions, H2 formation requires only one reducing equivalent per [HCoIII(L2)(CH3CN)]2+, indicating a bimetallic route wherein two cobalt hydride complexes react
两个新的四膦配体P n C-PPh 2 2 N Ph 2(1,5-二苯基-3,7-双((二苯基膦基)烷基)-1,5-二氮杂3,7-二磷环辛烷;烷基=(CH 2)2,n= 2(L 2);(CH 2)3,n= 3(L 3))已经合成。这些配体与钴的配位得到配合物[Co II(L2)(CH 3 CN)] 2+和[Co II(L3)(CH 3 CN)] 2+,它们经KC 8还原得到[Co I(L2)(通道3CN)+和[Co I(L3)(CH 3 CN)] +。Co I配合物的质子化提供[HCo III(L2)(CH 3 CN)] 2+和[HCo III(L3)(CH 3 CN)] 2+。使用数字仿真分析的[HCo III(L2)(CH 3 CN)] 2+的循环伏安法与涉及从[HCo II(L2)(CH 3)的可逆乙腈解离的E r C r E r还原机理一致CN)] +并导致形成HCo I(L2)。HCo