| Abstract: It is reported in this paper that a tetraazamacrocyclic nickel(Ⅱ)complex NiL(CIO4)2, where L is 2, 4, 4, 9, 11, 11-hexamethyl-1, 5, 8, 12-tetraazacyclotetradeca-1, 5, 8, 12-tetraene, can serve as oscillating catalyst in the system of NaBrO3-Pyr-H2SO4. The ranges of initial concentration of main reactants in the system were obtained.The influence of temperature, Vc, Br-, Ag+, Hg2+, acetonitrile or acrylamide on the oscillations were discussed.The results indicated that Br- played an important role controlling reaction progress and some free radicals.Br2 may be involved in the reaction process.The stirring rate can affect oscillating reactions.The oscillation trajectories of this system were recorded.They are different from classical BZ reactions and some other tetraazamacrocyclic complexes catalyzed systems.The mechanism is briefly discussed. |
