Experimental (FT-IR, NMR and UV) and theoretical (M06-2X and DFT) investigation, and frequency estimation analyses on (E)-3-(4-bromo-5-methylthiophen-2-yl)acrylonitrile.
The spectroscopic properties of (E)-3-(4-bromo-5-methylthiophen-2-yl)acrylonitrile have been investigated by FT-IR, UV, (1)H and (13)C NMR techniques. The theoretical vibrational frequencies and optimized geometric parameters (bond lengths and angles) have been calculated using density functional theory (DFT/B3LYP: Becke, 3-parameter, Lee-Yang-Parr) and DFT/M06-2X (the highly parameterized, empirical exchange correlation function) quantum chemical methods with 6-311++G(d,p) basis set by Gaussian 03 software, for the first time. The assignments of the vibrational frequencies have been carried out by potential energy distribution (PED) analysis by using VEDA 4 software. The theoretical optimized geometric parameters and vibrational frequencies were in good agreement with the corresponding experimental data, and with the results in the literature. (1)H and (13)C NMR chemical shifts were calculated by using the gauge-invariant atomic orbital (GIAO) method. The electronic properties, such as excitation energies, oscillator strength wavelengths were performed by B3LYP methods. In addition, the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energies and the other related molecular energy values have been calculated and depicted.
Department of Physics, Faculty of Art & Sciences, Bozok University, Yozgat 66100, Turkey; Sorgun Vocational School, Bozok University, Yozgat 66100, Turkey. Electronic address: yusufsert1984@gmail.com.
Yusuf
Y
Sert
Department of Chemistry, College of Science for Women, University of Babylon, Babylon, Iraq; College of Pharmacy, Babylon University, Iraq.
Asim A
AA
Balakit
Department of Physics, Faculty of Art & Sciences, Süleyman Demirel University, Isparta 32100, Turkey.
Nuri
N
Öztürk
Department of Physics, Faculty of Art & Sciences, Süleyman Demirel University, Isparta 32100, Turkey.
Fatih
F
Ucun
Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia.
Gamal A
GA
El-Hiti
D000181:Acrylonitrile / Q000737:chemistry*; D054879:Halogenation; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008958:Models, Molecular; D011789:Quantum Theory; D012984:Software; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013876:Thiophenes / Q000737:chemistry*
D013876:Thiophenes; D000181:Acrylonitrile
FT-IR spectra; Laser-Raman spectra; Methylthiophene; Vibrational study