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Crystal Structure and Vibrational Spectra of 3-Chloro-4-Phenyl-6-(Morpholine-4-yl)-Pyridazine by Hartree-Fock and Density Functional Methods      
Yazarlar
Prof. Dr. Abdullah AYDIN Prof. Dr. Abdullah AYDIN
Mersin Üniversitesi, Türkiye
Murat Kadir Şüküroğlu
Gazi Üniversitesi, Türkiye
Mehmet Akkurt
Erciyes Üniversitesi, Türkiye
Orhan Büyükgüngör
Ondokuz Mayıs Üniversitesi, Türkiye
Orhan Büyükgüngör
Ondokuz Mayıs Üniversitesi, Türkiye
Özet
The title compound, 3-chloro-4-phenyl-6-(morpholine-4-yl)-pyridazine (I), was prepared and characterized using elemental analysis and FT-IR and 1H NMR spectroscopy studies. The crystal and molecular structure of the title compound was determined from single-crystal X-ray diffraction data. It crystallizes in the orthorhombic space group P212121, Z = 8 with a = 7.5743 (3) Å, b = 14.8922 (8) Å, c = 23.3472 (9) Å, V = 2633.5 (2) Å3, and Dx = 1.391 Mg/m3. The title compound, C14H14ClN3O, crystallizes with two independent molecules A and B in the asymmetric unit, wherein the morpholine ring adopts a distorted chair conformation. The 1,6-dihydropyridazine ring creates dihedral angles of 47.0(3)° (in molecule A) and 47.9(2)° (in molecule B) with the phenyl ring, respectively. The crystal studied was an inversion twin with a 0.56(12):0.44(12) domain ratio. The molecular structure, vibrational frequencies, and intensities of the title compound were calculated using Hartree-Fock and density functional theory methods (BLYP, B3LYP, B3PW91, and mPW1PW91) using the 6-31G(d,p) basis set. The calculated geometric parameters were compared to the corresponding single crystal X-ray structure of the title compound. Comparison of the theoretical and experimental geometries of the title compound show that the X-ray parameters are in good agreement with the optimized molecular structure of the title compound. In addition, the harmonic vibrations computed for this compound using the B3LYP/6-31G(d,p) method are in good agreement with the observed vibrational spectral data. Theoretical vibrational spectra of the title compound were interpreted using PEDs and the VEDA 4 program. The superior performance of these investigated methods was calculated using the PAVF 1.0 program. © 2015
Anahtar Kelimeler
Ab initio calculations | alkanoic acids | B3LYP | DFT | infrared spectrum | non-steroidal anti-inflammatory drugs | vibrational frequencies
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Dergi ISSN 1542-1406
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q4
Makale Dili İngilizce
Basım Tarihi 01-2015
Cilt No 606
Sayı 1
Sayfalar 216 / 236
Doi Numarası 10.1080/15421406.2014.915664
Makale Linki http://dx.doi.org/10.1080/15421406.2014.915664