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Enthalpies of formation of monoderivatives of hydrocarbons: Interaction of polar groups with an alkyl group

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    0101970 - UOCHB-X 20043234 RIV US eng J - Journal Article
    Exner, Otto - Böhm, S.
    Enthalpies of formation of monoderivatives of hydrocarbons: Interaction of polar groups with an alkyl group.
    [Slučování entalpie monoderivátů uhlovodíků: Interakce polárních skupin s alkylovou skupinou.]
    Journal of Computational Chemistry. Roč. 25, - (2004), s. 1979-1986. ISSN 0192-8651. E-ISSN 1096-987X
    R&D Projects: GA MŠMT LN00A032
    Institutional research plan: CEZ:AV0Z4055905
    Keywords : B3PYP * electronegativity * isodesmic reaction
    Subject RIV: CF - Physical ; Theoretical Chemistry
    Impact factor: 3.168, year: 2004

    Energies of hydrocarbon monoderivatives were calculated at the levels B3LYP/6-311+G(d,p) and B3LYP/AUG-cc-pVTZ//B3LYP/6-311+G(d,p). The results were used to test the additive rule for the enthalpies of formation. Additivity fulfilled for butyl and pentyl derivatives.Methyl derivatives deviated up to 22kJ mol-1. Deviations are proportional to the electronegativity of the first atom of the substituent

    Energie monoderivát uhlovodíků byly vypočteny na úrovních B3LYP/6-311+G(d,p) a B3LYP/AUG-cc-pVTZ//B3LYP/6-311+G(d,p). Výsledky byly použity k ověření additivního pravidla pro slučovací entalpie. Additivita je splněna pro butyl a pentyl deriváty. Methyl deriváty se odchylují až o 22kJ mol-l. Odchylky jsou úměrné elektronegativitě prvního atomu substituentu
    Permanent Link: http://hdl.handle.net/11104/0009335


     
     
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