Abstract
Quantum mechanical calculations of energies, geometries and vibrational wave numbers of 7-amino-4-trifluoromethyl coumarin (7A4TFMC) were carried out using Hartree-Fock (HF) and density functional theory (DFT) using hybrid functional BLYP and B3LYP with 6–31G(d,p) as basis set. The optimized geometrical parameters obtained by HF and DFT calculations are in good agreement with the experimental X-ray data. The best method to reproduce the experimental wave numbers is B3LYP method with the 6–31G(d,p) basis set. The difference between the observed and scaled wave number values of most of the fundamentals is very small. A detailed interpretation of the infrared spectra of 7A4TFMC was also reported. The entropy of the title compound was also performed at HF using the hybrid functional BLYP and B3LYP with 6–31 G(d,p) as basis set levels of theory. Natural bond orbital (NBO) analysis of the title molecule is also carried out. The theoretical spectrogram for FTIR spectra of the title molecule has been constructed.
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R D H Murray, Prog. Chem. Org. Nat. Prod. 83, 673 (2002)
O Kayser and H Kolodziej, Z. Naturforsch 54c, 169 (1999)
T-S Wu, Z-J Tsang, P-L Wu, F-W Lin, C-Y Li, C-M Teng and K-H Lee, Bioorg. Med. Chem. 9, 77 (2001)
M Eugenia Riveiro, C Shayo, F Monczor, N Fernandez, A Baldi, N De Kimpe, J Rossi, S Debenedetti and C Davio, Cancer Lett. 210, 179 (2004)
Y Kanaoka, T Takahashi, T Nakayama, T Ueno and T Sekine, Chem. Pharm. Bull. (Tokyo) 30, 1485 (1982)
M Zimmermann, Anal. Biochem. 70, 258 (1976)
A Agban, M Ounanian, C Luu-Duc and D Monget, Ann. Pharm. Fr. 48, 326 (1990)
R V Nair, E P Fischer, S H Safe, C Courtez, R G Harvey and J DiGiovanni, Carcinogenesis 25, 65 (1991)
X Sang, X Shipping and L Lanmin, Chem. Abstr. 133, 104942 (2000)
L Bonsignore, G Loy, D Seci and A Calignano, Eur. J. Med. Chem. 28, 517 (1993)
S Shah and R U H Mehta, J. Indian Chem. Soc. 64, 708 (1987)
M F Clothier and L Byunghyun, Chem. Abstr. 117, 787 (1992)
M J Frisch et al, Gaussian 03, Revision B.03, Gaussian Inc., Wallingford, CT (2004)
H B Schlegel, J. Comput. Chem. 3, 214 (1982)
A Frisch, A B Nielsen and A J Holder, GAUSSIANVIEW Users Manual, Gaussian Inc., Pittsburgh, PA (2000)
S Selladurai and K Subramanian, Acta Crystallogr. C48, 281 (1992)
V Arjunan, N Puviarasan, S Mohan and P Murugasen, Spectrochim. Acta A67, 1290 (2007)
A P Scott and L Radom, J. Phys. Chem. 100, 16502 (1996)
N Sundaraganesan, H Saleem and S Mohan, Spectrochim. Acta A59, 2511 (2003)
M Alcolea Palafox, Int. J. Quant. Chem. 77, 661 (2000)
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Subramanian, M.K., Anbarasan, P.M. & Manimegalai, S. Molecular structure, vibrational spectroscopic studies and natural bond orbital analysis of 7-amino-4-trifluoromethyl coumarin. Pramana - J Phys 74, 845–850 (2010). https://doi.org/10.1007/s12043-010-0104-x
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DOI: https://doi.org/10.1007/s12043-010-0104-x