Abstract
The zinc(II) complex with nicotinamide (ncam) was prepared and investigated by single-crystal X-ray diffraction, infrared spectrum (FTIR), conductivity and thermal analysis techniques. The formula of complex is [Zn(ncam)2(H2O)4](NO3)2·2H2O. The nicotinamide molecule has three following donor sites: pyridine ring nitrogen, aminonitrogen and carbonyl group oxygen. In this monomeric complex, the Zn(II) ion is six-coordinated by two pyridine ring N atoms and four water O atoms in a slightly distorted octahedral arrangement. In the crystal structure, intermolecular O-H…O and N-H…O hydrogen bonds link the molecules to form a supramolecular structure. The complex is stable up to 323 and above 360 K it dehydrates in one step losing six water molecules. The dehydration proceeds in the range of 360–438 K, and its enthalpy value is equal to 62.6±1.5 kJ mol−1.
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Dziewulska-Kułaczkowska, A., Mazur, L. & Ferenc, W. Thermal, spectroscopic and structural studies of zinc(II) complex with nicotinamide. J Therm Anal Calorim 96, 255–260 (2009). https://doi.org/10.1007/s10973-008-9851-z
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DOI: https://doi.org/10.1007/s10973-008-9851-z