Ab initio Study of the Energetics of Protonation and Cationic Homoconjugation of Trimethylamine

Makowski, M.; Makowska, J.; Chmurzyński, L.

Artykuł - szczegóły

Tytuł artykułu

Ab initio Study of the Energetics of Protonation and Cationic Homoconjugation of Trimethylamine

Autorzy

Makowski M. , Makowska J. , Chmurzyński L.

Identyfikatory

Warianty tytułu

Języki publikacji

Abstrakty

Ab initio methods at the RHF (Restricted Hartree Fock) and MP2 (Moller-Plesset) levels were used to study the energetics of protonation of trimethylamine and its derivative trimethylamine N-oxide, as well as the energetics of formation of hydrogen bonded (NźźźHźźźN)+ and (OźźźHźźźO)+ type, respectively, homocomplexed cations. The Gaussian functional basis sets 3-21G, 6-31G, 6-311G, 6-31G* and 6-31+G*were employed to calculate energy and Gibbs free energy of protonation and cationic homoconjugation in the gas phase and with the inclusion of solvation effects (usingPCMmethod). The calculated energetic parameters in the gas phase and in solution, as well as experimental values of equilibrium constants of the acid dissociation and cationic homoconjugation reaction for trimethylamine and trimethylamine N-oxide systems provided a basis for a comparison of the basicity and tendency towards cationic homoconjugation of both compounds under study. Consequently, the acid-base properties of aliphatic bases have been compared with those of heterocyclic bases containing both oxygen and nitrogen.

Słowa kluczowe

protonation and cationic homoconjugation ab initio methods

Wydawca

Polskie Towarzystwo Chemiczne

Czasopismo

Polish Journal of Chemistry

Rocznik

2003

Tom

Vol. 77 / nr 11

Strony

1447--1459

Opis fizyczny

Bibliogr. 35 poz., rys.

Twórcy

autor

Makowski M.

Department of General Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland

autor

Makowska J.

Department of General Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland

autor

Chmurzyński L.

Department of General Chemistry, University of Gdańsk, Sobieskiego 18, 80-952 Gdańsk, Poland

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-article-BUJ1-0022-0011