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FT-IR spectra, vibrational assignments, and density functional calculations of imidazo[1,2-a]pyridine molecule and its Zn(II) halide complexes

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Abstract

The geometry, frequency, and intensity of the vibrational bands of imidazo[1,2-a]pyridine (which is abbreviated as impy) were obtained by the density functional theory (DFT) calculations with BLYP, B3LYP, and B3PW91 functionals and 6-31G(d) basis set. The optimized geometric bond lengths and bond angles are in good agreement with the available X-ray data. The infrared spectrum of imidazo[1,2-a]pyridine was computed by the DFT method in order to reproduce the vibrational wavenumbers and intensities with an accuracy, which allows reliable vibrational assignments. Total energy distribution and isotopic shifts have been calculated in order to help for the perfect assignment of the vibrational modes. The zinc halide complexes Zn(impy)2X2 [X = Cl, Br, and I] have also been synthesized. The compounds were characterized using the elemental analysis, FT-IR spectra, and quantum chemical calculations. The geometry optimization of Zn(impy)2X2 yields distorted tetrahedral environment around Zn ion.

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Acknowledgements

This study was funded by the Gazi University Research Fund. We want to thank our referee for his valuable comments. We also thank Dr. M. Tahir Güllüoğlu for SQM program.

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  1. Gazi Üniversitesi, Fen-Edb. Fak., Fizik Bölümü, Teknikokullar, Ankara, 06500, Turkey

    Şenay Yurdakul & Serdar Badoğlu

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  1. Şenay Yurdakul
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  2. Serdar Badoğlu
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Correspondence to Şenay Yurdakul.

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Yurdakul, Ş., Badoğlu, S. FT-IR spectra, vibrational assignments, and density functional calculations of imidazo[1,2-a]pyridine molecule and its Zn(II) halide complexes. Struct Chem 20, 423–434 (2009). https://doi.org/10.1007/s11224-009-9433-0

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  • DOI: https://doi.org/10.1007/s11224-009-9433-0

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