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Type: Artigo de periódico
Title: Studies of urea geometry by means of ab initio methods and computer simulations of liquids.
Author: Cirino, JJV
Bertran, CA
Abstract: STUDIES OF UREA GEOMETRY BY MEANS OF AB INITIO METHODS AND COMPUTER SIMULATIONS OF LIQUIDS, A study was carried out on the urea geometries using ab initio calculation and Monte Carlo computational simulation of liquids. The ab initio calculated results showed that urea has a non-planar conformation in the gas phase in which the hydrogen atoms are out of the plane formed by the heavy atoms. Free energies associated to the rotation of the amino groups of urea in water were obtained using the Monte Carlo method in which the thermodynamic perturbation theory is implemented. The magnitude of the free energy obtained from this simulation did not permit us to conclude that urea is non-planar in water.
Subject: urea
molecular geometry
Monte Carlo
Country: Brasil
Editor: Soc Brasileira Quimica
Citation: Quimica Nova. Soc Brasileira Quimica, v. 25, n. 3, n. 358, n. 363, 2002.
Rights: aberto
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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