Kinetic decay of H. in the radiolysis of tetracycline hydrochloride in powder form at 77 K

Kinetic decay of paramagnetic species formed in the radiolysis of tetracycline hydrochloride in powder form at 77 K, shows that most of the H. is not able to migrate. But when H. acquires enough kinetic energy to migrate, it reacts preferentially with species different from its partner. The e- is not observed by ESR, at 77 K, although tetracycline hydrochloride is a chemical trap for e- in methanol, benzyl alcohol and alkaline aqueous solutions. In the radiolysis of tetracycline hydrochloride in powder form, the dimethylammonium group blocks H. abstraction reaction at 77 K. (author) 18 refs.; 5 figs