Transition metal complexes with pyrazole-based ligands. Part 29. Reactions of zinc(II) and mercury(II) thiocyanate with 4-acetyl-3-amino-5-methylpyrazole

2009
Authors
Jaćimović, Željko K.
Bogdanović, Goran A.

Hollo, Berta
Leovac, Vukadin M.

Szecsenyi, Katalin Meszaros

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The work is concerned with the crystal and molecular structures of zinc(II) and mercury(II) complexes with 4-acetyl-3-amino-5-methylpyrazole (aamp) of the coordination formulae [Zn(NCS)(2)(aaMP)(2)] and (HaaMP)(2)[Hg(SCN)(4)]. The zinc(II) complex was obtained by the reaction of a warm methanolic solution of aamp with a mixture of zinc(II) nitrate and ammonium thiocyanate, whereas the mercury(II) complex was prepared by the reaction of a warm methanolic solution of aamp and a warm, slightly acidified aqueous solution of [Hg(SCN)(4)](2-). Both complexes have a tetrahedral geometry, which in the case of zinc complex is formed by monodentate coordination of two aamp molecules and two isothiocyanate groups. The Zn(II) and Hg(II) atoms have significantly deformed coordination geometry. In both crystal structures the pyrazole derivative has a planar form, probably stabilized by an intramolecular N-H center dot center dot center dot O hydrogen bond. Apart from the X-ray structural analysis, t...he isolated complexes were characterized by elemental analysis, IR spectroscopy, conductometric measurements and thermal analysis.
Keywords:
zinc(II) complex / mercury(II) complex / 4-acetyl-3-amino-5-methylpyrazole / crystal structure / thermal analysisSource:
Journal of the Serbian Chemical Society, 2009, 74, 11, 1259-1271Funding / projects:
DOI: 10.2298/JSC0911259J
ISSN: 0352-5139
WoS: 000272469700008
Scopus: 2-s2.0-77349118497
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VinčaTY - JOUR AU - Jaćimović, Željko K. AU - Bogdanović, Goran A. AU - Hollo, Berta AU - Leovac, Vukadin M. AU - Szecsenyi, Katalin Meszaros PY - 2009 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3843 AB - The work is concerned with the crystal and molecular structures of zinc(II) and mercury(II) complexes with 4-acetyl-3-amino-5-methylpyrazole (aamp) of the coordination formulae [Zn(NCS)(2)(aaMP)(2)] and (HaaMP)(2)[Hg(SCN)(4)]. The zinc(II) complex was obtained by the reaction of a warm methanolic solution of aamp with a mixture of zinc(II) nitrate and ammonium thiocyanate, whereas the mercury(II) complex was prepared by the reaction of a warm methanolic solution of aamp and a warm, slightly acidified aqueous solution of [Hg(SCN)(4)](2-). Both complexes have a tetrahedral geometry, which in the case of zinc complex is formed by monodentate coordination of two aamp molecules and two isothiocyanate groups. The Zn(II) and Hg(II) atoms have significantly deformed coordination geometry. In both crystal structures the pyrazole derivative has a planar form, probably stabilized by an intramolecular N-H center dot center dot center dot O hydrogen bond. Apart from the X-ray structural analysis, the isolated complexes were characterized by elemental analysis, IR spectroscopy, conductometric measurements and thermal analysis. T2 - Journal of the Serbian Chemical Society T1 - Transition metal complexes with pyrazole-based ligands. Part 29. Reactions of zinc(II) and mercury(II) thiocyanate with 4-acetyl-3-amino-5-methylpyrazole VL - 74 IS - 11 SP - 1259 EP - 1271 DO - 10.2298/JSC0911259J ER -
@article{ author = "Jaćimović, Željko K. and Bogdanović, Goran A. and Hollo, Berta and Leovac, Vukadin M. and Szecsenyi, Katalin Meszaros", year = "2009", abstract = "The work is concerned with the crystal and molecular structures of zinc(II) and mercury(II) complexes with 4-acetyl-3-amino-5-methylpyrazole (aamp) of the coordination formulae [Zn(NCS)(2)(aaMP)(2)] and (HaaMP)(2)[Hg(SCN)(4)]. The zinc(II) complex was obtained by the reaction of a warm methanolic solution of aamp with a mixture of zinc(II) nitrate and ammonium thiocyanate, whereas the mercury(II) complex was prepared by the reaction of a warm methanolic solution of aamp and a warm, slightly acidified aqueous solution of [Hg(SCN)(4)](2-). Both complexes have a tetrahedral geometry, which in the case of zinc complex is formed by monodentate coordination of two aamp molecules and two isothiocyanate groups. The Zn(II) and Hg(II) atoms have significantly deformed coordination geometry. In both crystal structures the pyrazole derivative has a planar form, probably stabilized by an intramolecular N-H center dot center dot center dot O hydrogen bond. Apart from the X-ray structural analysis, the isolated complexes were characterized by elemental analysis, IR spectroscopy, conductometric measurements and thermal analysis.", journal = "Journal of the Serbian Chemical Society", title = "Transition metal complexes with pyrazole-based ligands. Part 29. Reactions of zinc(II) and mercury(II) thiocyanate with 4-acetyl-3-amino-5-methylpyrazole", volume = "74", number = "11", pages = "1259-1271", doi = "10.2298/JSC0911259J" }
Jaćimović, Ž. K., Bogdanović, G. A., Hollo, B., Leovac, V. M.,& Szecsenyi, K. M.. (2009). Transition metal complexes with pyrazole-based ligands. Part 29. Reactions of zinc(II) and mercury(II) thiocyanate with 4-acetyl-3-amino-5-methylpyrazole. in Journal of the Serbian Chemical Society, 74(11), 1259-1271. https://doi.org/10.2298/JSC0911259J
Jaćimović ŽK, Bogdanović GA, Hollo B, Leovac VM, Szecsenyi KM. Transition metal complexes with pyrazole-based ligands. Part 29. Reactions of zinc(II) and mercury(II) thiocyanate with 4-acetyl-3-amino-5-methylpyrazole. in Journal of the Serbian Chemical Society. 2009;74(11):1259-1271. doi:10.2298/JSC0911259J .
Jaćimović, Željko K., Bogdanović, Goran A., Hollo, Berta, Leovac, Vukadin M., Szecsenyi, Katalin Meszaros, "Transition metal complexes with pyrazole-based ligands. Part 29. Reactions of zinc(II) and mercury(II) thiocyanate with 4-acetyl-3-amino-5-methylpyrazole" in Journal of the Serbian Chemical Society, 74, no. 11 (2009):1259-1271, https://doi.org/10.2298/JSC0911259J . .