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Theoretical Study on Intermolecular Interactions and Thermodynamic Properties of Nitroamine Dimers

Theoretical Study on Intermolecular Interactions and Thermodynamic Properties of Nitroamine Dimers Ab initio self‐consistent field (SCF) and Møller‐Plesset correlation correction methods employing 6‐31G* * basis set have been applied to the optimizations of nitroamine dimers. The binding energies have been corrected for the basis set superposition error (BSSE) and the zero‐point energy. Three optimized dimers have been obtained. The BSSE corrected binding energy of the most stable dimer is predicted to be ‐31.85 kJ/mol at the MP4/6‐31G* * /MP2/6‐31G* * level. The energy barriers of the Walden conversion for ‐ NH2 group are 19.7 kJ/mol and 18.3 kJ/mol for monomer and the most stable dimer, respectively. The molecular interaction makes the internal rotation around N1 ‐ N2 even more difficult. The thermodynamic properties of nitroamine and its dimers at different temperatures have been calculated on the basis of vibrational analyses. The change of the Gibbs free energy for the aggregation from monomer to the most stable dimer at standard pressure and 298.2 K is predicted to be 14.05 kJ/mol. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Chemistry Wiley

Theoretical Study on Intermolecular Interactions and Thermodynamic Properties of Nitroamine Dimers

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References (22)

Publisher
Wiley
Copyright
Copyright © 2002 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1001-604X
eISSN
1614-7065
DOI
10.1002/cjoc.20020200305
Publisher site
See Article on Publisher Site

Abstract

Ab initio self‐consistent field (SCF) and Møller‐Plesset correlation correction methods employing 6‐31G* * basis set have been applied to the optimizations of nitroamine dimers. The binding energies have been corrected for the basis set superposition error (BSSE) and the zero‐point energy. Three optimized dimers have been obtained. The BSSE corrected binding energy of the most stable dimer is predicted to be ‐31.85 kJ/mol at the MP4/6‐31G* * /MP2/6‐31G* * level. The energy barriers of the Walden conversion for ‐ NH2 group are 19.7 kJ/mol and 18.3 kJ/mol for monomer and the most stable dimer, respectively. The molecular interaction makes the internal rotation around N1 ‐ N2 even more difficult. The thermodynamic properties of nitroamine and its dimers at different temperatures have been calculated on the basis of vibrational analyses. The change of the Gibbs free energy for the aggregation from monomer to the most stable dimer at standard pressure and 298.2 K is predicted to be 14.05 kJ/mol.

Journal

Chinese Journal of ChemistryWiley

Published: Mar 1, 2002

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