Structure-reactivity correlations for reactions of substituted phenolate anions with acetate and formate esters
作者:Dimitrios Stefanidis、Sayeon Cho、Sirano Dhe-Paganon、William P. Jencks
DOI:10.1021/ja00058a006
日期:1993.3
substituted phenolate anions with m-nitrophenyl, p-nitrophenyl, and 3,4-dinitrophenyl formates follow nonlinear BrOnsted-type correlations that might be taken as evidence for a change in the rate-limiting step of a reaction that proceeds through a tetrahedral addition intermediate. However, the correlation actually represents two different BrOnsted lines that are defined by meta- and para-substituted phenolate
Heterolysis and homolysis energies for some carbon-oxygen bonds
作者:Edward M. Arnett、Kalyani Amarnath、Noel G. Harvey、Sampath Venimadhavan
DOI:10.1021/ja00176a039
日期:1990.9
Methods described previously for obtaining heterolysis (ΔH het ) and homolysis (ΔH homo ) enthalpies for bonds that can be cleaved to produce resonance-stabilized carbeniumions, anions, and radicals are extended to the study of carbon-oxygen bonds through the reactions of resonance-stabilized carbeniumions with substituted phenoxide ions. Titration calorimetry was used to obtain the heat of heterolysis
先前描述的获得异裂 (ΔH het ) 和均裂 (ΔH homo ) 焓的方法可以裂解以产生共振稳定的碳正离子、阴离子和自由基,通过共振反应扩展到碳-氧键的研究- 稳定的碳正离子与取代的酚盐离子。滴定量热法用于获得异解热,二次谐波交流伏安法(SHACV)法用于获得阴离子的可逆氧化电位
Thermodynamics of proton transfer in phenol-acetate hydrogen bonds with large proton polarizability and the conversion of light energy into chemical energy in bacteriorhodopsin