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Rate constants for the reaction of positive ions with solutes in irradiated liquid cyclohexane

✍ Scribed by John M. Warman; Pierre P. Infelta; Matthijs P. De Haas; Andries Hummel

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 808 KB
Volume: 43
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(76)85312-2

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✦ Synopsis

Tlie effect of added solutes on tbc decay kmctics of primary positive ions in irradiated cyclohexanc has been studied using the microwave absorption method. Absolute rate constants, in the range 1 to 3.5 X 10" 1 M-'C' , have been determinet: for the reaction of positive ions with ethanol, ammonia, cyclopropane, benzene, dimethylaniline and biphenyi. For a31 of the ahove solutes the activation energy for reaction is found to be less than 1 kcal/moie. Tbe rate constants obtained are compared with reactivity parameters available from steady-state radiolysis experiments. Taking for the yield of geminate ions a value of 5.0 (100 eV)+, the characteristic geminate ion lifetime, A-', in pure cyclohexanc is estimated to be 2.2 f 0.5 ps.

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