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Arrhenius plot for the decomposition of xanthine, hypoxanthine, and diaminopyrimidine. The Arrhenius equations are as follows: xanthine, log k = −6230/T + 9.42; hypoxanthine, log k = − 5270/T + 7.95; and diaminopyrimidine, log k = − 5341/T + 7.31.
