254105-83-4Relevant academic research and scientific papers
Transition metal complexes with pyrazole-based ligands. Part 8. Characterization and thermal decomposition of zinc(II) complexes with di- and trisubstituted pyrazoles
Meszaros Szecsenyi,Leovac,Jacimovic, Z K.,Cesljevic,Kovacs,Pokol,Gal
, p. 723 - 732 (2001)
We report the synthesis and the characterization (elemental analysis, FT-IR spectroscopy, thermal methods and molar conductivity measurements) of the mixed complexes of zinc with acetate and 3-amino-5-methylpyrazole, HL1, [Zn(OAc)2(HL1)2], or 3-amino-5-phenylpyrazole, HL2, [Zn(OAc)2(HL2)2], or 4-acetyl-3-amino-5-methylpyrazole, HL3, [Zn(OAc)(L3)(HL3)]2, with isothiocyanate and HL2, [Zn(SCN)2(HL2)2], or HL3, [Zn(SCN)2(HL3)2], and with nitrate, isothiocyanate and 3,5-dimethyl-1-carboxamidinepyrazole, HL4, [Zn(NO3)(NCS)(HL4)2]. The thermal decomposition of the complexes is generally continuous resulting zinc oxide as end product, except [Zn(OAc)(L3)(HL3)]2, in which case a well-defined intermediate was observed between 570-620 K. On the basis of the IR spectra and elemental analysis data of the intermediate a decomposition scheme is proposed.
