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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Computational implementation of the model charge-charge flux-dipole flux for calculation and analysis of infrared intensities

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Author(s):
Thiago C. F. Gomes [1] ; João Viçozo da Silva Jr. [2] ; Luciano N. Vidal [3] ; Pedro A. M. Vazquez [4] ; Roy E. Bruns [5]
Total Authors: 5
Affiliation:
[1] Universidade Estadual de Campinas. Instituto de Química. Departamento de Físico-Química - Brasil
[2] Universidade Estadual de Campinas. Instituto de Química. Departamento de Físico-Química - Brasil
[3] Universidade Estadual de Campinas. Instituto de Química. Departamento de Físico-Química - Brasil
[4] Universidade Estadual de Campinas. Instituto de Química. Departamento de Físico-Química - Brasil
[5] Universidade Estadual de Campinas. Instituto de Química. Departamento de Físico-Química - Brasil
Total Affiliations: 5
Document type: Journal article
Source: Química Nova; v. 31, n. 7, p. 1750-1754, 2008-00-00.
Abstract

The first computational implementation that automates the procedures involved in the calculation of infrared intensities using the charge-charge flux-dipole flux model is presented. The atomic charges and dipoles from the Quantum Theory of Atoms in Molecules (QTAIM) model was programmed for Morphy98, Gaussian98 and Gaussian03 programs outputs, but for the ChelpG parameters only the Gaussian programs are supported. Results of illustrative but new calculations for the water, ammonia and methane molecules at the MP2/6-311++G(3d,3p) theoretical level, using the ChelpG and QTAIM/Morphy charges and dipoles are presented. These results showed excellent agreement with analytical results obtained directly at the MP2/6-311++G(3d,3p) level of theory. (AU)