Abstract
The FT-IR and UV spectra of 2-ethylpyridine-4-carbothioamide have been recorded. The structure and spectroscopic data of the molecule in ground state have been calculated using AM1, PM3 semi-empirical methods, ab initio Hartree–Fock and density functional theory (B3LYP, B3PW91) methods by employing 6-31+ G (d, p) basis sets. The optimized geometry, vibrational frequencies in the ground state is calculated. The scaled vibrational frequencies are found to coincide with the experimentally observed values. The calculated highest occupied molecular orbital and lowest unoccupied molecular orbital energies show that charge transfer occurs within these molecules. In this work, we have calculated 1H and 13C nuclear magnetic resonance chemical shifts of the molecules using the gauge-including atomic orbital method matches with the experimental values. The natural localized molecular orbital analysis has been made to study the atomic hybrid contribution of the title molecule. Molecular electrostatic potential and total density distribution are constructed to understand the electronic properties and to study the most stable geometry of the compound from the potential energy scan.
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S Khasnobis, E E Vincent and D Chatterjee Expert Opin. Ther. Targets 6 21 (2002)
R J O Brien and P P Nunn Am. J. Respir. Crit. Care Med. 163 1055 (2001)
A Kochi Tubercle 72 1 (1991)
DOTS-plus: preliminary results and emerging issues, Proceedings of the Meeting of the Stop TB Working Group on DOTS Plus for MDR-TB, Tallinn, Estonia, April, 10–12. http://www.who.int/gtb/publications/dotsplus/TB-2002-307.pdf. (2002)
P Farmer et al. Int. J. Tubero. Lung Dis. 2 869 (1998)
C Dye et al. J. Am. Med. Assoc. 282 677 (1999)
C D Hamilton Curr. Infect. Dis. Rep. 1 80 (1999)
G B Migliori et al. Int. J. Tuberc. Lung Dis. 4 940 (2000)
D W Fitzgerald, M M Morse, J W Pape and W D Johnson Clin. Infect. Dis. 31 1495 (2000)
J Crofton et al. Transactions of the Royal Society of Tropical Medicine and Hygiene 92 238 (1998)
A Banerjee et al. Science 263 227 (1994)
B Heym et al. Lancet 344 293 (1994)
A Tommaso Vannelli, Alina Dykman and Paul R Ortiz de Montellano J. Biol. Chem. 277 12824 (2002)
S Muthu, G Ramachandran and J U Maheswari Spectrochimica Acta Part A 93 214 (2012)
Carl Kemnitz Chemoffice ultra 10 Trial version (2002)
M J Frisch et al. J. Comput. Chem. 3 214 (1982)
A Frisch et al. Gaussview Users Manual (Pittsburgh: Gaussian Inc.) (2007)
A D Becke Phys. Rev. A 38 3098 (1988)
C Lee, W Yang and R G Parr Phys. Rev. B 37 785 (1988)
J P Perdew, K Burke and Y Wang Phys. Rev. B 54 16533 (1996)
J P Perdew et al. Phys. Rev. B 48 4979 (1993)
G Schultz and I H Argittai J. Mol. Struct 346 63 (1995)
H Pir, N Günay, D Avci and Y Atalay Indian J. Phys. 86 1049 (2012)
R M Silverstein, G C Basseler and T C Morill Spectrometric Identification of Organic Compounds 4E (New York: John Wiley) 5th ed. p 245 (1981)
Y Sert, F Ucun and M Böyükata Indian J. Phys. 86 859 (2010); Y Sert, F Ucun and M Böyükata Indian J. Phys. 87 113 (2013)
S Kumar, A K Rai, S B Rai and D K Rai Indian J. Phys. 84 563 (2010); Y Sert and F Ucun Indian J. Phys. doi:10.1007/s12648-013-0293-5 (2013)
S Gunaskaran, B Anitha and S Seshadri Indian J. Pure Appl. Phys. 48 183 (2010)
S Gunasekaran, S Kumaresan, R Arunbalaj, G Anand and S Srinivasan J. Chem. Sci. 120 315 (2008)
E Kavitha, N Sundaraganesan and S Sebastian Indian J. Pure Appl. Phys. 48 20 (2010)
T Vijayakumar, I Hubert Joe, C P R Nair and V S Jayakumar Chem. Phys. 34 383 (2008)
V Arjunan, S Thillai Govindaraja, S Sakiadevi, M Kalaivani and S Mohan Spectrochimica Acta Part A 84 196 (2011)
Zhang Rui-Zhou, Li Xiao-Hong and Zhang Xian-Zhou Indian J. Pure Appl. Phys. 49 731 (2011)
C James, A Amal Raj, R Reghunathan, I Hubert Joe and V S Jayakumar J. Raman Spectrosc. 37 1381 (2006)
K Wolinski, J F Hinton and P Pulay J. Am. Chem. Soc. 112 8251 (1990)
J R Cheeseman, G W Trucks, T A Keith and M J Frisch J. Chem. Phys. 104 5497 (1996)
V Kumar, Y Panikar, M A Palafox, I Kostova, K Lang and K V K Rastogi Indian J. Pure Appl. Phys. 48 85 (2010)
G Varsanyi Assignments for Vibrational Spectra of Seven Hundred Benzene Derivatives, Vol 1–2 (London: Adam Hilger) (1974)
S Sebastian and N Sundaraganesan Spectrochimica Acta Part A 75 941 (2010)
P M Anbarasan, P Senthil kumar, K Vasudevan, R Govindan and V Aroulmoji Indian J. Phys. 85 1477 (2011)
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Gunasekaran, S., Rajalakshmi, K. & Kumaresan, S. Study of molecular structure and assignments of fundamental modes of 2-ethylpyridine-4-carbothioamide by density functional methods. Indian J Phys 87, 723–732 (2013). https://doi.org/10.1007/s12648-013-0309-1
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DOI: https://doi.org/10.1007/s12648-013-0309-1