| Autor: |
Langfelderová, H., Makánová, D., Gerši, P. |
| Zdroj: |
Journal of Thermal Analysis and Calorimetry; October 1991, Vol. 37 Issue: 10 p2335-2346, 12p |
| Abstrakt: |
A study was made of the influence of the composition of the Cu(II) coordination sphere on the course of the thermal decomposition of the complexes Cu4O(X+Y)6L4, whereX andY were Cl and Br, andL was piperidine or morpholine. The tetrahedral unit Cu4O with the oxygen atom in its centre was found to be the thermally weakest part of the complex. The decomposition temperatures of the complexes were strongly influenced by the anionsX andY and by the ligandL. The temperature at which decomposition started was found to be the lower, the more chloride anions were substituted by bromide anions. The complexes containing piperidine as ligandL exhibited higher decomposition temperatures than those with morpholine as ligand. The decompositions of all the studied complexes were accompanied by redox reactions. The only compounds identified among the decomposition intermediates by X-ray diffraction were copper(I) halides. Copper(I) bromide underwent oxidation on further heating and a mixture of CuO and CuBr was obtained as the final decomposition product. |
| Databáze: |
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