Three new homoleptic nickel(II) 1,1-dithiocarbamate complexes: synthesis,structure, electrical conductivity and DFT study |
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Abstract: | AbstractThree new homoleptic complexes of nickel having the formula Ni(L1)2] L1?=?C14H14N1O2S2-, N-(4-methoxybenzyl)(furfuryl)methane dithiocarbamate] (1), Ni(L2)2] L2?=?C17H18N1O2S2–, N-bis(4-methoxybenzyl)methane dithiocarbamate] (2) and Ni(L3)2] L3?=?C19H21N1O1S2-, N-(4-isopropylbenzyl)(4-methoxybenzyl)methane dithiocarbamate] (3), have been designed, synthesized, and characterized by elemental analysis, IR, 1H and 13C NMR and UV-visible absorption spectra showing that all complexes having analogous geometry and coordination number. The molecular structure of 2 is confirmed by single-crystal X-ray crystallography, which indicates that +2 charges on the metal ion (Ni2+) are balanced by dithiocarbamate anion. The X-ray analysis for 2 reveals a distorted square planar geometry around Ni2+ ion. Both C?–?H···S and intermolecular C–H···Ni interactions are the only artifact for the resulting Ni-dithiocarbamate architecture in 2. The electrical conductivity measurement between temperatures range of 303–393 K reflects that all complexes exhibit weak semiconducting behavior. Powder XRD, EDAX, and SEM spectra confirm the formation of NiS as thermal decomposition product in 1–3. The crystalline size of samples 1–3 was found to be 20.31?nm, 20.97?nm, and 20.39?nm, respectively. |
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Keywords: | Dithiocarbamate transition metal complexes C–H···Ni interactions conductivity |
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