Thermodynamics and kinetics of carbon dioxide binding to two stereoisomers of a cobalt(I) macrocycle in aqueous solution
作者:Carol Creutz、Harold A. Schwarz、James F. Wishart、Etsuko Fujita、Norman Sutin
DOI:10.1021/ja00009a022
日期:1991.4
The thermodynamics and kinetics of binding of CO 2 , CO, and H + to N-racemic and N-meso stereoisomers of the cobalt (I) macrocycle CoL + (L=5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene) have been determined in aqueous media with use of the pulseradiolysis technique and transient ultraviolet-visible spectroscopy. N-rac- or N-meso-CoL + was produced by the hydrated electron
CO 2 、CO 和 H + 与钴 (I) 大环 CoL + 的 N-外消旋和 N-内消旋立体异构体结合的热力学和动力学(L=5,7,7,12,14,14-六甲基- 1,4,8,11-四氮杂环十四-4,11-二烯)已在水性介质中使用脉冲辐射分解技术和瞬态紫外-可见光谱法测定。N-rac- 或 N-meso-CoL + 是通过 N-rac- 或 N-meso-CoL 2+ 的水合电子还原产生的,通常添加叔丁醇以清除羟基自由基
Electron paramagnetic resonance spectra of aliphatic ketyl radical anions in fluid solution
作者:Alwyn G. Davies、Anthony G. Neville
DOI:10.1039/p29920000163
日期:——
aliphatic ketylradicalanions in solution for study by EPR spectroscopy. These methods involve either photolysis of a solution of potassium in the corresponding alcohol (which probably proceeds by initial electron transfer to the solvent), or abstraction of a hydrogen atom from the corresponding alcohol by photolytically generated tert-butoxyl radicals under strongly basic conditions. The EPR spectra of
已经开发了用于在溶液中产生脂族酮基自由基阴离子的改进方法,以通过EPR光谱研究。这些方法包括对钾在相应醇中的溶液进行光解(可能通过初始电子转移到溶剂中进行),或在强碱性条件下通过光解生成的叔丁氧基从相应醇中提取氢原子。描述了许多新的醛和酮自由基离子的EPR光谱,并将其与共轭酸的光谱进行了比较。a(13的值发现丙酮自由基阴离子中的C-α)为52.2 G,确认它是非平面的。环己酮自由基阴离子中环的反转的Arrhenius参数为E a = 6.6 kcal mol –1,log(A / s –1)= 13.2。
Reduction potentials of CO2- and the alcohol radicals