Zur Polarographie von Peroxiden im Null‐Volt‐Bereich II: Oszillopolarogramme von Hydroperoxiden, Quecksilbersalzen und Hg‐Ionen in Gegenwart von Diacylperoxiden

Abstract

tion contains mainly of the di-succinyl and monocyclohexenyl adduct with a very small percentage of the mono-succinyl and mono-cyclohexenyl adduct, which are formed by Diels-Alder reaction of the conjugated mono-succinyl adduct with another mole of maleic anhydride. The molecular weight confirmed this.In order to identify the cyclohexene-structure, the esterified adduct was dehydrogenated into an aromatic structure. Ultraviolet spectra showed maxima at 273 mp and a shoulder a t 281 mp due to substituted benzene.The NMR spectra does not show the peak at t 4.4 for the olefins of the cyclohexene-grouping. Instead, a new peak appears at t 2.7-3.3 due to the aromatic hydrogen.GLC analysis of the mono-and di-carboxylic acids methyl esters obtained from oxidative fission of the adduct showed the presence of suberic and azelaic acids.Based on these results, it is very likely that the second fraction B of linolenate adduct has the structures given in Fig. 4.

Organic polarography

“…In other studies with aromatic Schiff bases, correlations were found with IR spectra, Hueckel calculations, and Hammett values (71). The effect of substituents was considered in studies with XC6H|N=CHCeH4Y derivatives (188).…”

“…Several books related to the topics of this review have been published in English or translated into English. The textbook on electrochemistry by Koryta, Dvorak, and Bohackova, which was first published in Czechoslovakia in 1966, can now be read in English (188).…”