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Radical intermediates generated by the splitting of X-H bond in different types of H-donors
Šafaříková, Lenka ; Mazúr, Milan (referee) ; Omelka, Ladislav (advisor)
In the frame of submitted diploma thesis dealing with the radical products of the decomposition of different X-H bonds, primary attention was focused on the detection of radical intermediates from decomposed N-H bonds. This access was realized with secondary amines of N-alkylaniline group, as well as with other structures R1-NH-R2. The aim was to confirm the formation of unstable aminyl radicals R1-N•-R2, which is possible by using spin-trapping method. In the series of experiments, where the compounds of lead and cobalt, as well as stable radical DPPH were applied as initiators of the decomposition, the unambiguous evidence for aminyl radicals was found only in the case of N-alkylanilines. With other secondary amines the detection of aminyl radicals is an open problem, because their adducts with nitrosobenzene are in very low concentration. Besides the study of the decomposition of N-H bonds also the products of the decomposition of phenolic O-H bonds, as well as products of the decomposition of C-H bonds in alkylsubstituents in phenols was studied.
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