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  • Author or Editor: R. Tudose x
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Abstract  

Parent and mixed ligand complexes of cobalt and copper with antipyrine derivatives of 1,2-ethanediamine or piperazine and with 2-aminobenzothiazole (TAB) were synthesized and their thermal behaviour was investigated. The complexes contain N,N′-bis(4-antipyrylmethyl)-piperazine (BAMP) or N,N′-tetra(4-antipyrylmethyl)-1,2-diaminoethane (TAMEN) or/and TAB as ligand, and Cl, ClO4 or SCN. The complexes decompose with the evolution of heat. The decomposition route depends on the presence of ClO4 . If the ClO4 is not coordinated, it oxidizes the TAB and BAMP or TAMEN and the decomposition is explosive.

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Abstract  

Parent and mixed ligand complexes of cobalt(II) and copper(II) ions with N,N'-bis- (4-antipyrylmethyl)piperazine or N,N'-tetra(4-antipyryl-methyl)-1,2-diaminoethane or/and imidazole as ligand and ClO4 - or SCN- as counterion were synthesised and their thermal behaviour was investigated.

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Abstract  

The thermal behaviour of the mixed-ligand complexes of cobalt(II) and copper(I) ions with antipyrine derivatives of 1,2-ethanediamine or piperazine (BAMP and TAMEN), with water and with 2-mercapto-benzothiazole (Hmbt) was investigated. The complexes contain 2-mercaptobenzothiazole (Hmbt, in the case of cobalt(II) ion) or dimercaptobenzothiazine (mbt–mbt, in the case of copper(I) ion) molecules as ligands and perchlorate (ClO4 ) or thiocyanate (SCN – ) ion as counterion. By heating, water and ligands release the solid phase at lower temperature. At higher temperatures process of different organic reactions of ligands (e.g. polymerization, polycondensation) could be suggested to interpret the relative high final mass values.

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Abstract  

The heterometallic complex [Cu(VO)2(C10H8N2)2(C2O4)3·2H2O] has been prepared and characterised by electronic and IR spectra, molecular electrical conductivity and thermal behaviour. A polymeric structure is proposed with oxalate and 4,4′-dipyridine acting as bridging ligands and VO(IV) of C4v symmetry and Cu(II) in octahedral surrounding the oxalate anion V4h.

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