KINETICS OF THE OXIDATION OF NITROUS-ACID BY TETRACHLOROAURATE(III) IN HCL

Authors
SENGUPTA KK SANYAL A SEN PK
Citation
Kk. Sengupta et al., KINETICS OF THE OXIDATION OF NITROUS-ACID BY TETRACHLOROAURATE(III) IN HCL, Transition metal chemistry, 19(5), 1994, pp. 534-538
Citations number
30
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Transition metal chemistry
ISSN journal
03404285 → ACNP
Volume
19
Issue
5
Year of publication
1994
Pages
534 - 538
Database
ISI
SICI code
0340-4285(1994)19:5<534:KOTOON>2.0.ZU;2-9
Abstract
The kinetics of the reaction between nitrous acid and gold(III) in an HCl medium was studied. The reaction was first order with respect to [ Au-III] and [HNO2].H+ and Cl- ions inhibit the rate and alkali metal i ons have specific effects on the rate. The reaction appears to involve different gold(III) species, viz. AuCl4-, AuCl3(OH2) and AuCl3(OH)(-) , which undergo a two-equivalent reduction to gold(I) leading to the f ormation of NO2+ which undergoes rapid hydrolysis to give nitric acid.