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<strong>Comparative structural and vibrational study of the two low energy conformers of neurotransmitter molecule: Norepinephrine [(R)-4-(2-amino-1-hydroxyethyl) benzene-1, 2-diol]</strong>

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Title Statement <strong>Comparative structural and vibrational study of the two low energy conformers of neurotransmitter molecule: Norepinephrine [(R)-4-(2-amino-1-hydroxyethyl) benzene-1, 2-diol]</strong>
 
Added Entry - Uncontrolled Name Jha, Omkant
YADAV, R A
banaras hindu university
 
Uncontrolled Index Term Atomic and molecular spectroscopy
DFT; HOMO-LUMO; Molecular structure; NBO; Vibrational; IR and Raman spectra
 
Summary, etc. A computational investigation of the two lowest energy conformers of norepinephrine has been carried out at the level B3LYP using the basis set 6-311++G**. Out of the 11 possible lowest energy conformers, the two lowest energy conformers have been investigated thoroughly for the optimized geometries, fundamental frequencies, PEDs, APT charges, natural bond orbital (NBO) analysis, MEP, contour map, total density array, HOMO-LUMO energies. The second conformer is energetically at higher temperature by 293 K with respect to the first conformer. The bond angles and lengths do not show much variation while the dihedral angles vary significantly in going from conformer first to the conformer second. Some of the vibrational modes of the benzene moiety are conformation dependent to some extent whereas most of the normal modes of vibration of ethanolamine side chain vary significantly in going from one conformer to the other one. The MEP for the two lowest energy conformers suggests that the sites of the maximum positive and negative ESP change on changing the conformation. The atomic charges have also changed significantly from conformer C-I to the conformer C-II.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2019-05-22 12:42:14
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/20128
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 57, ##issue.no## 5 (2019): Indian Journal of Pure & Applied Physics
 
Language Note en
 
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