Conformational analysis and crystal structure of (E)-3-methyl-4-(p-tolyldiazenyl)phenol |
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Authors: | Hasan Karabıyık Nazan Ocak İskeleli Çiğdem Albayrak Erbil Ağar |
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Affiliation: | (1) Department of Physics, Dokuz Eylül University, 35160 Buca, İzmir, Turkey;(2) Department of Science Education, Ondokuz Mayıs University, 57000 Sinop, Turkey;(3) Department of Chemistry, Ondokuz Mayıs University, 55139 Samsun, Turkey |
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Abstract: | The single crystal X-ray diffraction analysis of the title compound, C14H14N2O, reveals that an interesting intermolecular or extended structure (hydrogen-bonded polymeric zigzag chains) is formed by linking its monomer units with O–H···N type intermolecular hydrogen bonds. The compound crystallizes in the monoclinic space group P21/n with a = 5.8151(5) Å, b = 18.106(1) Å, c = 11.515(1) Å and β = 96.891(7)°. In order to understand better its structural aspects in solid state, quantum chemical (PM3) calculations were performed on a part of the extended structure of the title compound containing ten monomers. To determine in vacuo conformational flexibility of the compound, molecular energy profile of the title compound was obtained with respect to a selected torsional degree of freedom and the pedal angle varied from ?180° to +180° in every 10°. The results from the computational study suggest that hydrogen-bonding properties in the crystal lattice is fundamental in determining the crystallographically observed conformation of the title compound. |
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Keywords: | Azobenzene Pedal motion Hydrogen bond PM3 Crystal structure |
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