Benzidine rearrangements. 19. The concerted nature of the one-proton rearrangement of 2,2'-dimethoxyhydrazobenzene
作者:Henry J. Shine、Koon Ha Park、Marilyn L. Brownawell、Joseph San Filippo
DOI:10.1021/ja00335a035
日期:1984.11
Determination des effetsisotopiques cinetiques de l'azote etdu carbone dansla transposition du dimethoxy-2,2' hydrazobenzene en m-dianisidine, catalysee par un acide
Determination des effets isotopiques cinetiques de l'azote et du carbone dans la transposition du di 二甲氧基-2,2' hydrazobenzo en m-dianisidine, catalysee par un acide
The mechanism of nitration by 4-methyl-4-nitro-2,3,5,6-tetrabromocyclohexa-2,5-dienone
作者:Robert G. Coombes、John H. Ridd
DOI:10.1039/c39920000174
日期:——
Nitration of phenol by 4-methyl-4-nitro-2,3,5,6-tetrabromocyclohexa-2,5-dienone in diethyl ether is a radical process involving reaction between the phenoxyl radical and NO2˙ that has escaped from a radical pair in which it was formed by homolytic fission of the C–N bond.
and during the reaction of 1 with 15N-enriched nitric acid and nitrous acid, emission due to the nitration products o- and p-nitrophenol (2a, 2b) is observed in the 15N-NMR spectra. The CIDNP effects are built up by radical pairs formed by the encounters of the radicals NO2· and 1+· or PhO·. During the reaction of 1 with nitrous acid, 2b is formed, in part due to a non-radical reaction, via oxidation