Abstract
NBO-NJC decomposition of vicinal 3 J HH spin-spin coupling constants into Lewis, delocalization, and repolarization contributions are presented. A deep study allows to assign the main contributions to specific orbitals or electron delocalizations between two orbitals. 3 J HH torsional dependence and the substituent effect are analyzed according to the main orbital contributions for ethane and fluoroethane molecules using different basis sets. The torsional dependence for the energies corresponding to electron delocalization is also studied.
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The following financial supports are gratefully acknowledged: Dirección General de Enseñanza Superior e Investigación Científica of Spain (DGESIC), projects: CTQ2010-19232 and CTQ2010-17338, Spanish Agency of International Co-operation, project: A1/035856/11. Computer time provided by the Centro de Computación Científica of Universidad Autónoma de Madrid is gratefully acknowledged.
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García de la Vega, J.M., San Fabián, J. Natural bond orbital/natural J-coupling study of vicinal couplings. J Mol Model 20, 2225 (2014). https://doi.org/10.1007/s00894-014-2225-5
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DOI: https://doi.org/10.1007/s00894-014-2225-5