Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1410712 | Journal of Molecular Structure | 2007 | 4 Pages |
Abstract
In this paper, we have calculated the nuclear quadrupole resonance (NQR) parameters of the quadrupole nuclei involved in the hydrogen bonds (COââ¯H-C and +N-Hâ¯âOC) in the monomer and pentameric cluster of dl-proline by HF and B3LYP methods and basis sets of 6-311+Gâ and 6-311++Gââ. These computations are performed on the basis of X-ray diffraction structural data of dl-proline. The results indicate that the calculations including hydrogen-bonding (HB) interactions (in pentamer) are in better agreement with the experimental data than those in which these interactions are neglected (in monomer). The quantum chemical calculations show that the intermolecular hydrogen-bonding interactions play an important role in determination of the NQR parameters of 14N, 2H of NH2+ group and 17O.
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Authors
Sareh M. Nasseri, Nasser L. Hadipour, Ali Reza Mohebbi,