The Pulse Radiolysis of Aqueous Solutions of Simple RCN Compounds

Authors: I.G. Draganić, Z. D. Draganić, V. M. Marković

Fast kinetic spectrophotometry was used to study the absorption spectra of short-living intermediates produced by reactions of RCN molecules with H, e aq- and OH. The spectra were obtained on the microsecond time scale after an electron pulse from a Febetron 707 accelerator in aqueous solutions of the following compounds: hydrocyanic acid, acetonitrile, propionitrile, malononitrile and succinonitrile. It has been found that all intermediates absorb in the U.V. range ( λ⩽300 nm) and disappear by fast bimolecular processes with decay rate constants of about 10 9dm 3mol -1s -1. In the presence of an efficient scavenger for hydroxyl radicals, the same transient spectra were registered in acid and neutral solutions suggesting that the protonations of e aq- adducts of these RCN molecules were complete within a submicrosecond time interval.

https://doi.org/10.1016/0020-7055(76)90077-2