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Synthesis of new azo schiff bases of pyrazole derivatives and their spectroscopic and theoretical investigations       
Yazarlar
Sevil Özkınalı
Hitit Üniversitesi, Türkiye
Prof. Dr. Mahmut GÜR Prof. Dr. Mahmut GÜR
Kastamonu Üniversitesi, Türkiye
Prof. Dr. Nesrin ŞENER Prof. Dr. Nesrin ŞENER
Kastamonu Üniversitesi, Türkiye
Satı Alkın
Doç. Dr. Muhammet Serdar ÇAVUŞ Doç. Dr. Muhammet Serdar ÇAVUŞ
Kastamonu Üniversitesi, Türkiye
Özet
New pyrazole Schiff bases containing azo groups, 4-((E)-phenyldiazenyl)-3-(4-nitrobenzylidene)-1-phenyl-pyrazole-5-amine and its series, were synthesized using the condensation reaction between p-nitrobenzaldehyde and (E)-1-phenyl-4-(phenyldiazenyl)-1H-pyrazole-3,5-diamine in the molar ratio of 1:1. The compounds were characterized using IR, UV--Vis, 1H-NMR and 13C-NMR spectroscopies. The UV--Vis spectral data were obtained in ethanol, chloroform, N,N-dimethylformamide (DMF), DMF (pH = 2) and DMF (pH = 12), which have different polarity and pH values. Meanwhile, the experimental spectral analyses were supported by the theoretical calculations based on the density functional theory (DFT) using the B3LYP/cc-pvtz level. Structural analyses, vibrational frequencies, UV, and NMR calculations were performed at the same level of the theory. In addition, via using HOMO-LUMO energies, the electrochemical quantities such as chemical hardness and electronegativity were calculated and analyzed.
Anahtar Kelimeler
Azo | Azo-imine | DFT | Pyrazole | Pyrazole schiff bases | Schiff bases
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı JOURNAL OF MOLECULAR STRUCTURE
Dergi ISSN 0022-2860
Dergi Tarandığı Indeksler SCI
Dergi Grubu Q2
Makale Dili İngilizce
Basım Tarihi 12-2018
Cilt No 1174
Sayı 1
Sayfalar 74 / 83
Doi Numarası 10.1016/j.molstruc.2018.06.070
Makale Linki https://linkinghub.elsevier.com/retrieve/pii/S0022286018307713