An NMR study of the equilibria involved with benzotriazole, carbonyl compounds, and their adducts
1990; Royal Society of Chemistry; Issue: 6 Linguagem: Inglês
10.1039/p29900000921
ISSN2050-8239
AutoresAlan R. Katritzky, Subbu Perumal, G. Paul Savage,
Tópico(s)Chemical Reaction Mechanisms
ResumoA 1H and 13C NMR study of the equilibrium mixtures of benzotriazole and several carbonyl compounds with their adducts, in [2H6]benzene and other solvents, affords the equilibrium constants for the reversible formation of N-1 (K1) and N-2 (K2) isomeric adducts. Thermodynamic parameters have been computed. Adduct formation is generally less predominant in sterically crowded cases. In general the N-1 isomer predominates over the N-2 isomer, however, with the sterically hindered 4,7-dimethylbenzotriazole this order is reversed.
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