Ligand Effects on the Chemical Activity of Copper(I) Complexes: Outer‐ and Inner‐Sphere Oxidation of Cu
<sup>I</sup>
L
作者:Ariela Burg、Eric Maimon、Haim Cohen、Dan Meyerstein
DOI:10.1002/ejic.200600702
日期:2007.2
The effect of the ligands acetonitrile (AN), fumaric acid (H2fum) and 2,5,8,11-tetramethyl-2,5,8,11-tetraazadodecane (L1) on the kinetics of oxidation of CuI complexes by [(cyclam)NiIII(SO4)2]– and [(NH3)5CoIIICl]2+ in aqueous solutions via an outer- and inner-sphere mechanism, respectively, has been studied. The effects of the ligands on the electron self-exchange rate constants have also been evaluated
配体乙腈 (AN)、富马酸 (H2fum) 和 2,5,8,11-四甲基-2,5,8,11-四氮杂十二烷 (L1) 对 [(cyclam )NiIII(SO4)2]– 和 [(NH3)5CoIIICl]2+ 在水溶液中分别通过外球和内球机制进行了研究。还评估了配体对电子自交换速率常数的影响。研究的所有配体都稳定了水溶液中的 CuI,但对 CuII/IL 对的氧化还原电位的影响不同。配体降低了氧化还原反应的速率和电子自交换速率常数。结果表明乙腈和烯烃不应用作涉及氧化还原步骤的 [CuIL]+ 催化过程的溶剂。另一方面,结果还表明 [CuIL1]+ 应该是此类过程的良好催化剂。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)