Naslov
Synthesis, characterization and thermal decomposition of the pyridine adducts of Co, Ni, Cu and Zn sulfate
(Synthesis, characterization and thermal decomposition of the pyridine adducts od Co, Ni, Cu and Zn sulfate)

Autori
Jordanovska, Vera ; Boyanov, Bojan ; Trojko, Rudolf ; Naumov, P.

Izvornik
Journal of thermal analysis and calorimetry (1388-6150) 59 (2000), 3; 859-686

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
M(II) sulfates ; pyridine adducts ; thermal composition

Sažetak
Pyridine adducts of Co, Ni, Cu and Zn sulfate were obtained by refluxing the corresponding sulfate with pyridine in chloroform. The compounds were characterized by elemental analysis, x-ray powder diffraction and FTIR spectroscopy. The elemental and thermal analysis results revealed that the formulae of the complexes are M2(SO4)2xC5H5NyH2O where x=2, 3, 2, and 1 and y=6, 4, 6 and 4 for the Co, Ni, Cu and Zn compound, respectively. The complexes were not found to be isostructural, but certain structural similarities were observed between Zn and Co compounds. Although the thermal decomposition pathways of the various compounds were quite different and each consisted of several steps, in all cases the dehydration preceded the depyridination. The spectral data are discussed with regard to the thermal behaviour. Appreciably strong hydrogen bonding and pronounced structural differences relating the sulfate ions were presumed for the Cu compound.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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