Summary
The thermal behavior of the pyrazolyl complexes [NiCl<Subscript>2</Subscript>(HPz)<Subscript>4</Subscript>] (1), [Ni(NCS)<Subscript>2</Subscript>(HPz)<Subscript>4</Subscript>] (2), [NiCl<Subscript>2</Subscript>(HdmPz)<Subscript>4</Subscript>]·2H<Subscript>2</Subscript>O (3) and [Ni(NCS)<Subscript>2</Subscript>(HdmPz)<Subscript>4</Subscript>]·2H<Subscript>2</Subscript>O (4) (HPz=pyrazole, <Emphasis Type=”Italic”>HdmPz</Emphasis>=3,5-dimethylpyrazole) has been studied by thermogravimetry (TG) and differential thermal analysis (DTA). The TG data indicated that the thermal stability of [NiX<Subscript>2</Subscript>(HL)<Subscript>4</Subscript>] (X=Cl, NCS) compounds varies depending on the pyrazolyl ligand in the following order <Emphasis Type=”Italic”>HL=HPz>HdmPz</Emphasis>. From the thermal decomposition of 3 and 4 it was possible to isolate the intermediate compounds [Ni(µ-Cl)<Subscript>2</Subscript>(HdmPz)<Subscript>2</Subscript>] (3a) and [Ni(µ-1,3-NCS)<Subscript>2</Subscript>(HdmPz)<Subscript>2</Subscript>] (4a), respectively. The final products of the thermal decompositions of 1-4 were identified as NiO by X-ray powder diffraction.
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Bannach, G., Mendes, R., Ionashiro, E. et al. Thermal studies on solid 2-chlorobenzylidenepyruvate of lighter trivalent lanthanides. J Therm Anal Calorim 79, 329–334 (2005). https://doi.org/10.1007/s10973-005-0059-1
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DOI: https://doi.org/10.1007/s10973-005-0059-1