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- W1569512989 abstract "The aim of this work is to verify by preparative organo-electrosynthesis the theoretical analyses of consecutive reactions which follow the anodic generation of radicals in the presence of olefinic scavengers as given in Part I [1]. The addition of anodically generated azide radicals to styrene if performed in acetonitrile and using Pt-anodes is a relatively unselective reaction. Besides the undesired annihilation of azide radicals which yields N6 (with eventual formation of N2) there are found in the product mixture at least nine different organic compounds containing the azido group. Main products are 1,2-diazido-phenyl-ethane and 1,4-diazido-2,3-diphenyl-butane which are produced with current efficiencies between 8 and 90%. Side products being generated with efficiencies between 0 and 10% are 1-azido-2-phenyl-ethane, 1-azido-2-phenyl-ethylene, 1-azido-2-hydroxy-2-phenyl-ethane, 1-methyl-2-(2-azido-1-phenyl-ethyl)-2,3,4,5,-N-tetrazole, as “monomeric” products and three “dimeric” compounds: 1,4-diazido-1,3-diphenyl-butane, 4-azido-1,3-diphenyl-butene-1 and its isomer 1-azido-2,4-diphenyl-butene-1. Most of these products, and especially the two main products, are generated by typical homogeneous radical-reaction sequences which are initiated by the addition of anodically produced azide radicals, to styrene within a reaction layer of some 10 nm thickness. Detailed investigation of the influence of reaction parameters and additive effects on yields makes it clear that all consecutive reactions are homogeneous reactions and that the first addition radical may not be further oxidized. Predictions concerning the selectivity of this type of organo-synthetic reaction based on a theoretical treatment of the electrode and homogeneous reactions [1] and on numerical rate data obtained from electrode kinetic measurements [2] have been verified to an extent which permits a generalization of the given results for product optimization of other comparable electrolysis processes. A redetermination of the rate constant for addition of N3-radicals to styrene from the preparative data gives very good agreement with rate determined from electrode kinetic measurements." @default.
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- W1569512989 date "1983-09-01" @default.
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- W1569512989 title "Addition reactions of anodically generated radicals to olefins" @default.
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- W1569512989 doi "https://doi.org/10.1016/s0022-0728(83)80529-4" @default.
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