β Scribed by Masato Nakashima; Richard M. Noyes
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In the presence of elementary iodine, isobutyl iodide (2-methyl-1-iodopropane) undergoes isotopic exchange and also decomposes with production of additional iodine. Both reactions are approximately first order in isobutyl iodide and half order in iodine molecules. I n degassed hexachlorobutadiene at 160Β°, the rate constants for exchange and decomposition are 7.5 x and 11.4 x lop6 (liter/mole)"* sec-l, respectively. The decomposition is probably initiated by iodine atom abstraction of a B hydrogen atom, but comparison with rates for related compounds indicates that this hydrogen abstraction does not contribute significantly to the mechanism of exchange.
π SIMILAR VOLUMES
The: rate constant for the reaction I(2P1,2) + CH3I + I:! + CH3 has been reevaluated taking into account both collisional deactivation of excited iodine atoms and loss of 12 The reevaluation is based upon data obtained (R. T. Meyer, J. Chem. Phys., 46, 4146 (1967)] from the flash photolysis of CH31
The kinetics and mechanisms of the iodine and t&iodide ion reduction and iodide and &iodide ion oxidation on platinum have been determined, from a study of the electrochemical kinetic behaviour of DMSO solutions containing an iodine/sodium-iodide ratio greater than one. The likely mechanisms are the
The isotopic exchange reaction of iodine in neutral aqueous solutions of iodide and iodate ions at 250Β°C is found to be second order, and first order with respect to each of the reactants. This indicates the presence of an induction period of 0.5-10 h depending upon the concentration of the reactant