A
spectroscopic investigation, used quantum chemical calculations, of
2,4'-dibromoacetophenone (2,4'-DBrA) molecule have been obtained in this paper.
The calculations were supported the experimental results by IR, 1H
and 13C NMR techniques. Geometrical parameters and optimized
energies of 2,4'-DBrA molecule were performed by density functional theory
(DFT) B3LYP method 6-311++G(d,p) basis sets. After the geometry optimization of
2,4'-DBrA the vibrational spectra were obtained for this structure. The
fundamental vibrations were assigned to base on potential energy distribution
(PED) of the vibrational modes by using VEDA 4 (Vibrational Energy Distribution
Analysis) program. Density of states for total (TDOS), partial (PDOS) and also
overlap population (OPDOS) analysis were obtained. 1H and 13C
NMR chemical shifts were recorded by using the gauge-invariant atomic orbital
(GIAO) method. Besides, electronic properties, such as HOMO and LUMO energies,
were performed by time-dependent density functional theory (TD-DFT). Also,
molecular electrostatic potential surface (MEPs) and thermodynamic properties
were calculated for title molecule. The results are showed consistent with the
obtained experimental results.
Subjects | Engineering |
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Journal Section | Articles |
Authors | |
Publication Date | December 1, 2016 |
Published in Issue | Year 2016 Volume: 17 Issue: 4 |