Réactions chimiques oscillantes. II. Comportement de la «période d'induction» dans les systémes BrO/Ce4+/Cyclohexanone et BrO/Ce4+/Cyclopentanone

✍ Scribed by Vincent J. Farage; DéSimir Janjic

• Publisher: John Wiley and Sons
• Year: 1978
• Tongue: German
• Weight: 285 KB
• Volume: 61
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19780610505

✦ Synopsis

Suisse) (13.XII. 77) Oscillating Chemical Reactions. 11. Behaviour of the "induction period" in the BrO~/Ce4+/Cyclohexanon and Br0~/Ce4+/Cyclopentanon systems

Summary

1. The addition of a-monobromoketone, one of the products of reaction of the BrO~/Ce4+/Cyclohexanon (Sl) and BrO:/Ce4+/Cyclopentanon ( S 2 ) oscillating systems, decreases and even suppresses the induction period (rind) in the case of s 2 .

Such is not the case with S1: t i n d , increases and the oscillations can even be completely inhibited.

2. The order of addition of the reagents and the time lapse (tad,) preceding the addition of the last of them influences tind., particularly when the last reagent added is Ce4+.

3. In our experimental conditions, the inhibition of the oscillatory phenomenon by C1-ions is definite only for IC1-I 35,O. ~O -* M (Sl) and IC1-I > 2 , 5 . 1 0 -3 ~ (S2); for lower concentrations rind, increases with 1 C1-1 .