Kinetics of hexachloroiridate(IV) reduction by some aryl alcohols in sodium acetate–acetic acid buffer medium

✍ Scribed by Kalyan K. Sen Gupta; Nandini Bhattacharjee

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 74 KB
• Volume: 13
• Category: Article
• ISSN: 0894-3230
• DOI: 10.1002/(sici)1099-1395(200003)13:3<157::aid-poc221>3.0.co;2-y

✦ Synopsis

The kinetics of the reduction of hexachloroiridate(IV) by benzyl alcohol (PhCH 2 OH), some substituted benzyl alcohols (XC 6 H 4 CH 2 OH, where X = NO 2 , Cl and OMe), and benzhydrol (Ph 2 CHOH) to give benzaldehyde, the corresponding substituted benzaldehydes and benzophenone, respectively, were investigated in sodium acetateacetic acid buffer medium. A mechanism is proposed involving the formation of an intermediate 1:1 complex between iridium(IV) and the alcohol, followed by the decomposition of the complex to give products through the formation of free radicals. Thermodynamic parameters associated with the equilibrium step and activation parameters associated with the rate-determining step were also evaluated.