THE OXIDATION POTENTIALS OF ALDEHYDES AND KETONES
THE OXIDATION POTENTIALS OF ALDEHYDES AND KETONES
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DOI：
10.1021/ja01179a012
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发表时间：
1949-01-01
影响因子：
15
通讯作者：
ROBINSON, CC
中科院分区：
文献类型：
--
作者：
ADKINS, H;ELOFSON, RM;ROBINSON, CC
表中数据所依据的实验观察是由F. W. Cox, 2 . Robert H. Baker, 3 . 4 AG Rossow, 6 . CC Robinson6和Richard M. Elofson所做的。最后一个人计算了本文给出的所有值，并得出结论7，除苯甲醛外，先前公布的值高了33 mv。氧化电位是根据某些quiñones的氧化电位计算出来的。已知氧化电位8的三个quiñones包括在该系列中，即9,10 -蒽醌，154 mv。， 1-氯蒽醌，174毫伏。9,10 -蒽醌-2-羧酸异丙基，222毫伏。一个酮，2,7 -二氯芴酮，分别与这三个平衡quiñones。2,7 -二氯芴酮的氧化电位E0由醌的氧化电位计算得到，表达式为Ea=£0'+ RT/NFIn K，其中K为上述反应的平衡常数。对于25，表达式为E0= E′× 0.0296 log a。酮的氧化电位分别为157、156和160 mv。取决于比较中使用的醌。氟芴酮和二苯甲酮也相互平衡，并与9,10 -蒽醌平衡。这些酮依次与环己酮平衡，后者与2,7 -二氯-平衡
The experimental observations on which the data in the table are based were made by F. W. Cox, 2 Robert H. Baker, 3· 4 AG Rossow, 6 CC Robinson6 and Richard M. Elofson. 7 Thelast named has cal-culated all the values given herewith, and has concluded7 that except for benzaldehyde, the values previously published are high by 33 mv The oxidation potentials were calculated on the basis of the oxidation potentials of certain quiñones. Three quiñones of known oxidation potentials8 were included in the series, i. e., 9, 10-anthraquinone, 154 mv., 1-chloroanthraquinone, 174 mv. and isopropyl 9, 10-anthraquinone-2-carboxylate, 222 mv. One ketone, 2, 7-dichlorofluorenone, was equilibrated against each of the three quiñones. The oxidation po-tential, E0, of 2, 7-dichlorofluorenone was cal-culated from the oxidation potential of a quinone£„'using the expression Ea=£ 0'+ RT/NFIn K where K is the equilibrium constant for the reaction given above. For 25 the expression becomes E0= E'¡+ 0.0296 log A. The oxidation potential of the ketone was found to be 157, 156 or 160 mv. depending upon the quinone used in comparison. Fluorenone and benzophenone have also been equilibrated against each other and against 9, 10-anthraquinone. These ketones were in turn equilibrated against cyclohexanone and the latter against 2, 7-dichloro-