On the Relevance of Considering the Intermolecular Interactions on the Prediction of the Vibrational Spectra of Isopropylamine
Joint Authors
Ribeiro-Claro, Paulo J. A.
Amado, Ana M.
Fiuza, Sónia M.
Batista de Carvalho, Luis A. E.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-11-05
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The effects of implicitly considering the effects of hydrogen bonding on the molecular properties, such as vibrational frequencies, were inferred on the basis of DFT calculations.
Several clusters of isopropylamine were assembled and theoretically characterized.
The results showed that maximum H-bond cooperativity is achieved when the amine group acts simultaneously as donor and acceptor.
The effect of H-bond cooperativity manifests itself in the relative cluster stability and on the structural and vibrational frequency predictions.
Referring to the vibrational frequencies it was found that the NH2 stretching and torsion vibrational modes are the most affected by the amine involvement in hydrogen bonding.
Both stretching modes were found to be significantly redshifted relative to the monomer.
The NH2 torsional mode, on the other hand, was found to be blueshifted up to 350 cm-1.
Finally, the comparative study between the theory levels performed allows to conclude that the small 6-31G* basis set is able to stabilize weak C–H⋯N interactions as long as the new dispersion corrected DFT methods are considered.
The impairments observed with conventional DFT methods for describing weak interactions may be overcome with the improvement of basis set, but the associated increase of computational costs may turn the calculations unfeasible.
American Psychological Association (APA)
Amado, Ana M.& Fiuza, Sónia M.& Batista de Carvalho, Luis A. E.& Ribeiro-Claro, Paulo J. A.. 2013. On the Relevance of Considering the Intermolecular Interactions on the Prediction of the Vibrational Spectra of Isopropylamine. Journal of Chemistry،Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-490170
Modern Language Association (MLA)
Amado, Ana M.…[et al.]. On the Relevance of Considering the Intermolecular Interactions on the Prediction of the Vibrational Spectra of Isopropylamine. Journal of Chemistry No. 2013 (2013), pp.1-12.
https://search.emarefa.net/detail/BIM-490170
American Medical Association (AMA)
Amado, Ana M.& Fiuza, Sónia M.& Batista de Carvalho, Luis A. E.& Ribeiro-Claro, Paulo J. A.. On the Relevance of Considering the Intermolecular Interactions on the Prediction of the Vibrational Spectra of Isopropylamine. Journal of Chemistry. 2013. Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-490170
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-490170