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Type: Artigo de periódico
Title: Implementação computacional do modelo carga-fluxo de carga-fluxo de dipolo para cálculo e interpretação das intensidades do espectro infravermelho
Title Alternative: Computational implementation of the model charge-charge flux-dipole flux for calculation and analysis of infrared intensities
Author: Gomes, Thiago C. F.
Silva Jr., João Viçozo da
Vidal, Luciano N.
Vazquez, Pedro A. M.
Bruns, Roy E.
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.
Subject: ab initio and DFT electronic structure methods
CCFDF/QTAIM and CCFDF/ChelpG absolute infrared intensities
molecular spectroscopy
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422008000700030
Date Issue: 1-Jan-2008
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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