Vibrational spectroscopic study of o-, m- and p-hydroxybenzylideneaminoantipyrines

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Yuxi SunXu-Jie Yang

Abstract

Three structurally similar antipyrine derivatives of o-hydroxybenzylideneaminoantipyrine (o-HBAP), m-hydroxybenzylideneaminoantipyrine (m-HBAP) and p-hydroxybenzylideneaminoantipyrine (p-HBAP) were characterized by FT-IR, FT-Raman experimental techniques and density functional theoretical (DFT) calculations. The comparisons between the calculated and experimental results covering molecular structures, assignments of fundamental vibrational modes and thermodynamic properties were investigated. The optimized molecular geometries agree well with the corresponding experimental values by comparing with the XRD data. The comparisons and assignments of the vibrational frequencies indicate that the experimental spectra also coincide satisfactorily with those of theoretically simulated spectrograms except the hydrogen-bond coupling infrared vibrations, and compounds can be distinguished by the IR and Raman spectra due to the differences of the hydroxyl-substituted positions and molecular packing, and the strong Raman scattering activities of the compounds are tightly relative to the molecular conjugative moieties linked through the Schiff base imines. The thermodynamic functions and their correlations with temperatures were also obtaine...Continue Reading

References

Feb 15, 2001·Acta Crystallographica. Section C, Crystal Structure Communications·T HökelekZ Kiliç
Jul 19, 2005·Lung Cancer : Journal of the International Association for the Study of Lung Cancer·Makoto NishioTakeshi Horai
May 2, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Yu-Xi SunXin Wang

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Citations

Dec 3, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Ersin TemelNefise Dilek

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