Autor:	V. I. Rybachenko, V. V. Kovalenko, Krystian Eitner, K. Yu. Chotii, Grzegorz Schroeder
Rok vydání:	2001
Předmět:	chemistry.chemical_compound Reaction rate constant Chemistry Group (periodic table) Pyridine Physical chemistry SN2 reaction General Chemistry Acetonitrile Dynamic equilibrium Equilibrium constant Reaction coordinate
Zdroj:	Theoretical and Experimental Chemistry. 37:230-235
ISSN:	0040-5760
DOI:	10.1023/a:1012524427859
Popis:	We have studied 18 reactions, including four identity reactions, involving transfer of a dimethylcarbamoyl group with N-acylpyridinium bonds to pyridine and its 4-substituted derivatives in acetonitrile solutions at 298 K. The rate constants kij varied within the range 0.4 to 10−6 L/mol·s; the equilibrium constants Kij varied from 107 to 10−5. The rate and equilibrium for exchange of carbamoyl groups are described satisfactorily by the Bronsted equation. We have shown that all the reactions occur according to a forced concerted SN2 mechanism. The structure of the transition state and its position on the reaction coordinate for identity transfer are considered using a More O'Ferrall-Jencks diagram.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f1271a6385d59af1f89fbc2e6f07d57d https://doi.org/10.1023/a:1012524427859 Zobrazit plný text záznamu Full text from SpringerLink