FT-Raman, FT-IR and NMR spectra, vibrational assignments and density functional studies of 1,3-bis(benzimidazol-2-yl)-2-thiapropane ligand and its Zn(II) halide complexes |
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Authors: | Naz Mohammed Aghatabay Metin Tulu Mehmet Somer Durata Haciu Ayberk Yilmaz |
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Institution: | 1. Department of Chemistry, Fatih University, Büyük?ekmece, Istanbul, 34500, Turkey 2. Department of Chemistry, Ko? University, Rumelifeneri Yolu, Sariyer, Istanbul, 34450, Turkey 3. Department of Physics, Istanbul University, Vezneciler, Istanbul, 34459, Turkey
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Abstract: | 1,3-bis(benzimidazol-2-yl)-2-thiapropane (L) ligand and its zinc halide ZnX2 (X = Cl, Br, I) complexes have been synthesized. The compounds were characterized using the elemental analysis, molar conductivity,
FT-Raman, FT-IR (mid i.r., far i.r.), 1H and 13C NMR spectra, and quantum chemical calculations performed with Gaussian 03 package program set. The optimized geometries
and vibrational frequencies of the ligand and Zn(L)Cl2] complex were calculated using the DFT/B3LYP method with a 6–31g(d) basis set. The geometry optimization of Zn(L)Cl2] yields a slightly distorted tetrahedral environment around Zn ion, while the molecule clearly reveals the Cs symmetry. The
molar conductivity data reveals that the complexes are neutral. The ligand is bidentate, via two of the imine nitrogen atoms
in the bis-imidazole ring units, and together with the monodentate coordination of the two halides to the metal centre. |
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Keywords: | Benzimidazole Bidentate Distorted Mononuclear Quantum chemical calculations Tetrahedral |
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