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Volumn 113, Issue 20, 2000, Pages 9208-9216

Density functional study of crystalline acetic acid and its proton transfer polymorphic forms

Author keywords

[No Author keywords available]

Indexed keywords

CRYSTAL SYMMETRY; CRYSTALLINE MATERIALS; ENERGY TRANSFER; MOLECULAR STRUCTURE; PROBABILITY DENSITY FUNCTION; PROTONS;

EID: 0034316641     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1319699     Document Type: Article
Times cited : (31)

References (72)
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  • 30
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    • edited by V. Pontikis and M. Meyer (Kluwer, Dordrecht), and references therein
    • (b) G. Galli and M. Parrinello, in Computer Simulation in Materials Science, edited by V. Pontikis and M. Meyer (Kluwer, Dordrecht, 1991), and references therein.
    • (1991) Computer Simulation in Materials Science
    • Galli, G.1    Parrinello, M.2
  • 55
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    • For applications of the Parrinello-Rahman method see Ref. 27
    • M. Parrinello and A. Rahman, Phys. Rev. Lett. 45, 1196 (1980). For applications of the Parrinello-Rahman method see Ref. 27.
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    • note
    • The difference syn/anti for the gas phase acetic acid molecule is not known experimentally, but microwave studies for formic acid indicated this difference to be at least 4 kcal/mol [Ref. 12(b)]. Previous theoretical studies using ab initio and semiempirical methods gave values in the range 2.6-8.4 kcal/mol [Ref. 18(a)].
  • 72
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    • note
    • The experimental values correspond to free energy differences while the computed values correspond to internal energies. However, the contribution of the entropic term to the energy barrier in the condensed phase is expected to be very small, as both syn and anti forms would have a similar vibrational spectra. Thus, taking into consideration the entropic term would not change this picture.


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