this technique. Thermodynamic cycles prove that the observed reduction potentials are closely related to the standard reduction potentials E°(RCoIII + e−⇆R⋅ + CoI). Electron-withdrawing groups and/or an increased degree of substitution at the Co-bound C-atom in RCblIII and, R‘Cby’III shift Ep(1a–z) and Ep (2a–z) towards positive potentials. Linear correlations have been found between Ep(1a–z) (Ep(2a–z))
26 alkylcob的不可逆还原电位(III)alamins(RCbl III 1A - Ž)和26 alkylcob(III)yrinates(R'Cby” III ;图2a - Ž)(É p 1A - Ž和ë p 2A - Ž, 。RE
SP)进行了测量原位由hydroxocob的单扫描伏安法(III)胺素盐酸盐(
维生素B 12B -
盐酸; 1)或七甲基穗轴(II)yrinate
高氯酸(CLO 4 'CBY' II ; 2)在存在相应的卤代烷(RX;
DMF中的3a – z)。通过这种技术可以测量显示出短至几秒钟的半衰期的烷基
钴配合物的还原电位。热力学循环证明,观察到的还原电势与标准还原电势E °(RCo III + e - ⇆R⋅+ Co I)密切相关。吸电子基团和/或取代的在RCbl共同结合的C原子的增加的程度III和,R'Cby” III移ë p(1A - Ž)和È p(2A -