Abstract
Oxygen-free aqueous solutions of 0.1 M NH2CN (pH 2.4 and 5) were irradiated with y rays (0.01-25 Mrad). The rate constants determined in competition experiments are: k(H + NH2CN) = 6.7 X 106 M-1 sec-', k(eaq- + NH2CN) = 1.5 X 109 M-1 sec-1, and k(OH + NH2CN) = 8.5 X 106 M -sec-1. Radiation-chemical yields were determined for the decomposition of cyanamide molecules and the formation of several radiolytic products. The following compounds were identified in irradiated solutions: H2, CO2, NH3, urea, biuret, arginine, and a -N=N- molecule assigned to methylaminoazoformamide. Possible reactions of secondary free radicals leading to the formation of radiolytic products were considered by taking into account the model of water radiolysis and the measured radiation yields.
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