COMPLEXING ABILITY OF SOME 2-PYRAZOLINE- 4-DITHIOCARBOXYLIC ACID DERIVATIVES

Autor:	S. A. El-gyar, M. M. Kandeel, M. A. El-gahami
Rok vydání:	1991
Předmět:	Denticity Coordination number Metal ions in aqueous solution Organic Chemistry Inorganic chemistry Thermal decomposition Pyrazoline Uranyl Biochemistry Inorganic Chemistry Metal chemistry.chemical_compound chemistry visual_art Polymer chemistry visual_art.visual_art_medium Molecule
Zdroj:	Phosphorus, Sulfur, and Silicon and the Related Elements. 62:119-125
ISSN:	1563-5325 1042-6507
DOI:	10.1080/10426509108034467
Popis:	Substituted 2-pyrazoline-4-dithiocarboxylic acid complexes with Cu(II), Ni(II), Co(II), La(III), Ce(III), Th(IV) and UO2(II) have been isolated. The structures of the complexes are recognized by elemental analyses, thermal decomposition, electronic and IR spectral data as well as conductance measurements. The ligands are coordinated to the metal ions as monovalent bidentate ligand. Thermogravimetric studies indicate that these complexes are stable up to 180°C and undergo complete decomposition in the range 180–430°C resulting in the formation of stable metal oxides. In Th(IV), Ce(III), or La(III) nitrate complexes, nitrate ions are bidentately coordinated to the metal ion, resulting in the formation of six-coordinate nitrato complexes. The formula of the complexes suggests that, uranyl ion has a coordination number of six. This is achieved by coordination of two molecules of the bidentate title ligands in addition to the two water molecules which have already been bonded to the UO2(II) species. A...
Databáze:	OpenAIRE
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