𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Inorganic reactions of iodine(+1) in acidic solutions

✍ Scribed by Guy Schmitz

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
182 KB
Volume
36
Category
Article
ISSN
0538-8066

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

We present a thorough analysis of the former works concerning the hydrolysis of iodine and its mechanism in acidic or neutral solutions and recommend values of equilibrium and kinetic constants. Since the literature value for the reaction H~2~OI^+^ β‡Œ HOI + H^+^ appeared questionable, we have measured it by titration of acidic iodine solutions with AgNO~3~. Our new value, K(H~2~OI^+^ β‡Œ HOI + H^+^) ∼ 2 M at 25Β°C, is much larger than accepted before. It decreases slowly with the temperature. We have also measured the rate of the reaction 3HOI β†’ IO~3~^βˆ’^ + 2I^βˆ’^ + 3H^+^ in perchloric acid solutions from 5 Γ— 10^βˆ’2^ M to 0.5 M. It is a second order reaction with a rate constant nearly independent on the acidity. Its value is 25 M^βˆ’1^ s^βˆ’1^ at 25Β°C and decreases slightly when the temperature increases, indicating that the disproportionation mechanism is more complicated than believed before. An analysis of the studies of this disproportionation in acidic and slightly basic solutions strongly supports the importance of a dimeric intermediate 2HOI β‡Œ I~2~OΒ·H~2~O in the mechanism. Β© 2004 Wiley Periodicals, Inc. Int J Chem Kinet 36:480–493, 2004

πŸ“œ SIMILAR VOLUMES

Inorganic reactions of iodine(III) in ac
Inorganic reactions of iodine(III) in acidic solutions and free energy of iodous acid formation
✍ Guy Schmitz πŸ“‚ Article πŸ“… 2008 πŸ› John Wiley and Sons 🌐 English βš– 106 KB

## Abstract An analysis of the former works devoted to the reactions of I(III) in acidic nonbuffered solutions gives new thermodynamic and kinetic information. At low iodide concentrations, the rate law of the reaction IO + I^βˆ’^ + 2H^+^ β‡Œ IO~2~H + IOH is __k__~+B~ [IO][I^βˆ’^][H^+^]^2^ – __k__~βˆ’B~ [I

Rate constants for reactions of iodine a
Rate constants for reactions of iodine atoms in solution
✍ Z. B. Alfassi; R. E. Huie; S. Marguet; E. Natarajan; P. Neta πŸ“‚ Article πŸ“… 1995 πŸ› John Wiley and Sons 🌐 English βš– 443 KB πŸ‘ 1 views

Laser flash photolysis (at 248 or 308 nm) or aryl iodides in water or water/methanol solutions produces iodine atoms and phenyl radicals. Iodine atoms react rapidly with added I-to form 12-but do not react rapidly with 0 2 ( k I lo7 L mol-l s-l). Iodine atoms oxidize phenols to phenoxyl radicals, wi