the results of the present work. The observed exchange currents at platinum electrodes in iodide-iodine solutions are much greater than the apparent rate of electron exchange between adsorbed iodine (or iodide) and dissolved iodine (or iodide) (24). Our results indicate that I2 adsorbs extensively on an iodidecovered surface so that a reaction such as 2 need not be involved. (The present work does not distinguish between I2 or I as the adsorbed entity.) In addition, if the sites, S, are assumed to be the same as those on which the iodide ion is adsorbed, they would not be available for a reaction such as 1 because the iodide adsorption is irreversible, the iodide (solution)-iodide (adsorbed) exchange reaction is slow, and the adsorbed iodide is not electroactive.

No abstract

Ethyl Methyl Cetyl Malonate.-To a solution of 5.2 g. of sodium in 100 cc. of absolute alcohol, 40 g. of ethyl methylmalonate was added. Then, 77 g. of cetyl iodide was added and the mixture refluxed until neutral. The alcohol was distilled in vacuo and the residue extracted with ether. The oil obtained after concentration was fractionated at reduced pressure: at 1 mm., b. p. 185-190°; yield 63 g.