Reactions involving isotopic exchange of heterocyclic compounds with D2O in the presence of transition metals (review)
The results of isotopic exchange with D2O of various O-, N-, and S-containing heterocycles and some hydrocarbons on transition metals are discussed from the positions of the theory of π-complex adsorption. The effect of various fragments of the molecules (the aromatic or alicyclic ring, electron-donor or electron-acceptor substituents, double bonds, and the number and nature of the heteroatoms) on the character of the substrate-catalyst interaction and on the reaction as a whole is examined on the basis of kinetic data from 1H and 13C NMR spectroscopy and Chromatographic mass spectrometry. Isotopic exchange mechanisms are discussed.