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Synthesis, Thermal and Spectral Properties of Cu(II) and Ni(II) Complexes with Furopyridines or Quinoline

A. Krutošíková, B. Mitasová, E. Jóna, and M. Bobošíková

Department of Chemistry, Faculty of Natural Sciences, University of St. Cyril and Methodius, SK-917 01 Trnava

 

E-mail: krutosik@ucm.sk

Abstract: The thermal decomposition of the complexes Cu(NO3)2(fp)2. MeOH (I), Cu(NO3)2(dmfp)2 (II), and Ni(NO3)2(qu)4. 2MeOH (III) (where fp = furo[3,2-c]pyridine, dmfp = 2,3-dimethylfuro[3,2-c]pyridine, qu = quinoline, and Me = methyl) had been investigated in dynamic air from room temperature to 1000°C by means of thermogravimetry (TG), differential thermogravimetry (DTG), and differential thermal analysis (DTA). The possible scheme of thermal decomposition of the complexes is suggested. The chemical composition of the solid intermediates and the resultant products of thermolysis has been identified by means of elemental analysis and complexometric titration. The thermal stability (according to TG temperature) of these complexes can be ordered in the increasing sequence: I, III, II. The results revealed that CuO or NiO were left as residues at the end of the thermal degradation experiments. Fp, dmfp, and qu were coordinated to Cu(II) through the IV atom of the respective heterocyclic ring. IR data suggested the bidentate coordination of nitrates to CU(II) in complexes I and II and unidentate coordination of nitrates to Ni(II) in complex III.

Full paper in Portable Document Format: 555a290.pdf

 

Chemical Papers 55 (5) 290–293 (2001)

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