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Quantitative molecular thermochemistry based on path integrals
Author(s) -
Kurt R. Glaesemann,
Laurence E. Fried
Publication year - 2005
Publication title -
the journal of chemical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 357
eISSN - 1089-7690
pISSN - 0021-9606
DOI - 10.1063/1.1954771
Subject(s) - thermochemistry , path integral formulation , path integral monte carlo , monte carlo method , statistical physics , ab initio , path (computing) , harmonic , harmonic oscillator , physics , ab initio quantum chemistry methods , computational chemistry , chemistry , quantum mechanics , thermodynamics , molecule , mathematics , computer science , statistics , quantum , programming language
The calculation of thermochemical data requires accurate molecular energies and heat capacities. Traditional methods rely upon the standard harmonic normal-mode analysis to calculate the vibrational and rotational contributions. We utilize path-integral Monte Carlo for going beyond the harmonic analysis and to calculate the vibrational and rotational contributions to ab initio energies. This is an application and an extension of a method previously developed in our group [J. Chem. Phys. 118, 1596 (2003)].

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