NMR Properties of the Formic Acid Dimer

• Autorzy: Jaroniec J. , Jaszunski M.
• Konferencja: 1st Symp. on NMR in Chemistry, Biology and Medicine; 8-10 Semptember, Warsaw, Poland. Issue dedicated to honour Prof. Witanowski
• Języki publikacji: EN

Abstrakty

EN

NMR properties - nuclear quadrupole coupling constants, shielding constants and indirect spin-spin coupling constants - in the formic acid dimer are studied using ab initio methods. The accuracy of the calculations is examined for the C2hminimum structure of (HCOOH)2, comparing theMCSCF (multi-configuration SCF) and CCSD (coupled cluster singles and doubles) results. The dependence of the NMR parameters on dimer geometry is analysed for simultaneous double proton transfer, considering the C2h minimum, theD2h transition state and a few intermediate structures, aswell as for two structures representing single proton transfer. For the nuclei involved in the hydrogen bonds not only the effects of the dimerization are very large; the computed NMR parameters also vary significantly with the structure of the cyclic formic acid dimer.

Słowa kluczowe

EN

ab initio calculations; NMR parameters; formic acid dimer

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2006
• Tom: Vol. 80, nr 7
• Strony: 1061--1074
• Opis fizyczny: Bibliogr. 32 poz., rys.

Twórcy

autor

Jaroniec J.

autor

Jaszunski M.

• Faculty of Chemistry, University of Maria Curie-Skłodowska, Maria Curie-Skłodowska sq. 3, 20-031 Lublin, Poland

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