Thermal decomposition of trialkyl/arylphosphine gold(I) cyanide complexes

Citation
Mn. Akhtar et al., Thermal decomposition of trialkyl/arylphosphine gold(I) cyanide complexes, J THERM ANA, 61(1), 2000, pp. 119-125
Citations number
19
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN journal
13886150 → ACNP
Volume
61
Issue
1
Year of publication
2000
Pages
119 - 125
Database
ISI
SICI code
1388-6150(2000)61:1<119:TDOTGC>2.0.ZU;2-I
Abstract
Combined TG/DTA techniques have been used to study the thermal decompositio n of R3PAuCN (where R is ethyl, cyclohexyl, o-tolyl, m-tolyl, p-tolyl, ally l, cyanoethyl, 1-naphthyl and phenyl) complexes. It was observed that all o f these complexes underwant decomposition cum redox reactions in the range of 200-600 degrees C with evolution of both trans ligands, which are phosph ine and cyanide, leaving metallic gold as a residue. The thermal decomposit ion of o-Tol(3)PAuCN has revealed that this is a stepwise process. In the f irst step decomposition takes place with evolution of phosphine and generat ion of AuCN, which in second step undergoes a redox reaction to produce met allic gold. The DTA curves have also confirmed these results.