In:
Journal of the Serbian Chemical Society, National Library of Serbia, Vol. 81, No. 8 ( 2016), p. 897-905
Abstract:
The thermal behaviour of a Pt(IV) and a Ru(II) complex coordinated to
O,O'-di-n-butyl-(S,S)-ethylenediamine-N,N'-di-2-(3-cyclohexyl)propanoate has
been investigated using thermogravimetry (TG) and differential scanning
calorimetry (DSC). The study included investigation of the thermal
decomposition of these complexes in the temperature range of 30 to 590?C and
evaluation of activation energy for the first decomposition steps. For both
metal complexes, broad DSC peaks indicated complex thermal transformation
processes. The two-step decomposition of the Pt(IV) complex started at 175
and ended at about 418?C, leaving elemental platinum as a final residue. On
the other hand, the Ru(II) analogue decomposed in three stages. Thermal
degradation was evident beginning at 144?C and suggested the decomposition of
a coordinated ligand as dominant process. For this complex, the proposed
final residue was RuO2. Kinetic parameters for the first decomposition step
were obtained by means of multi-heating rates method, in this case the
Kissinger-Akahira-Sunose (KAS) method. The mean activation energy calculated
for 0.2 〈 ? 〈 0.8 were 122.0 kJ mol?1 for the Pt(IV) and 118.9 kJ mol?1 for
the Ru(II) complex and decreased constantly, characteristic of a multi-step
process.
Type of Medium:
Online Resource
ISSN:
0352-5139
,
1820-7421
DOI:
10.2298/JSC160320059M
Language:
English
Publisher:
National Library of Serbia
Publication Date:
2016
detail.hit.zdb_id:
2030173-X
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