Sinteza i karakterizacija nekih derivata pirazola i njihove reakcije sa prelaznim metalima

Holló, Berta

doi:10.2298/ns20110922hollo

Synthesis and characterization of some pyrazole derivatives and their reactions with transition metals

Abstract

Reactions of 3,5-dimethylpyrazole-1-carboxamidinium nitrate (dpca∙HNO3) and 4-acetyl-3-amino-5-methylpyrazole (aamp) with transition metals under different reaction conditions are presented. The template reaction of aamp with triethyl orthoformate (teof) in the presence of metal ion is described. Besides, condensation of aamp with thiosemicarbazide (tsc) and the coordination of its product to copper(II) ion is also described. Twelve new complex compounds are synthesized and fully characterized. The characterization of two other, already known complexes is significantly enriched. The influence of HSAB interactions between the metal ions and ligators on the structures of obtained compounds is studied. The influence of the reaction conditions on the composition, structure and quality of crystals obtained in the reactions is investigated. Compounds are characterized by structural analysis, elemental analysis, molar conductivity data, infrared spectrometry and thermal analysis. Some selecte...

Faculty:
University of Novi Sad, Faculty of Science
Date:
22-09-2011

Projects:

Design, synthesis, characterization and assessment of practical applications of coordination and organometallic compounds (RS-172014)

Keywords:

Kompleksi Cu(II) / Complexes of Cu(II) / Ni(II) / Co(II) / Cd(II) / Zn(II) / Hg(II) / 3 / 5–dimetilpirazol–1–karboksamidinijum nitrat / 4-acetil-3- amino-5- metilpirazol / N / N-bis(4-acetil-5-metilpirazol-3-il)formamidin / tiosemikarbazon 4-acetil-3-amino-5-metilpirazola / fizičko-hemijska karakterizacija / struktura / termička analiza / Ni(II) / Co(II) / Cd(II) / Zn(II) / Hg(II) / 3 / 5- dimethylpyrazole-1-carboxamidinium nitrate / 4-acetyl- 3-amino-5-methylpyrazole / N / N-bis(4-acetyl-5-methylpyrazol-3-yl)formamidine / thiosemicarbazon 4-acetyl-3-amino-5-methylpyrazole / physicochemical characterization / structure / thermal analysis