Theoretical investigations of ?,?,?-trifluoro-3, -p and o-nitrotoluene by means of density functional theory
Yükleniyor...
Tarih
2012
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study reports the optimized molecular structures, vibrational frequencies including Infrared intensities and Raman activities, corresponding vibrational assignments, H-1 and C-13 NMR chemical shifts, the magnitudes of the JCH and JCC coupling constants, Ultraviolet-visible (UV-vis) spectra, thermodynamic properties and atomic charges of the title compounds, alpha,alpha,alpha-trifluoro-3, -p and o-nitrotoluene, in the ground state by means of the density functional theory (OFT) with the standard B3LYP/6-311++G(d,p) method and basis set combination for the first time. Theoretical vibrational spectra were interpreted by normal coordinate analysis based on scaled density functional force field. The results show that the vibrational frequencies and chemical shifts calculated were obtained to be in good agreement with the experimental data. Based on the comparison between experimental results and theoretical data, the calculation level chosen is powerful approach for understanding the identification of all the molecules studied. In addition, not only were frontier molecular orbitals (HOMO and LUMO), molecular electrostatic potential (MEP) and electrostatic potential (ESP) simulated but also the dipole moment, softness, electronegativity, chemical hardness, electrophilicity index, transition state and energy band gap values were predicted. According to the investigations, all compounds were found to be useful to bond metallically and interact intermolecularly; however, the thermodynamic properties confirm that the alpha,alpha,alpha-trifluoro-p-nitrotoluene was more reactive and more polar than the others. (C) 2011 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Alpha,alpha,alpha-Trifluoro-3, -p and o-nitrotoluene, B3LYP, MEP, ESP
Kaynak
Spectrochimica Acta Part A-Molecular And Biomolecular Spectroscopy
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
85
Sayı
1
