Cyclohexene, reaction with deuterium over

A remarkable effect was observed when sintered iron films were used. The multiple exchange process disappears and a normal distribution is obtained (see Pig. 7b). The use of sintered films also enabled a course of reaction to be followed (cyclohexene at 0°, cyclopentene at —35°) stepwise olefin exchange was observed, slightly more marked with cyclopentene than with cyclohexene, and the results bear a marked resemblance to those shown for the reactions of ethylene and of 1-butene with deuterium over nickel in Figs. 5 and 6. Sintering also removes the ability of iron films to catalyze the disproportionation of cyclohexene to cyclohexene and benzene, and for this reason it was... 

Fiq. 7. Reaction of cyclohexene with deuterium over iron films (52). (a) Final product distribution over unsintered films A, —35° B, 0° C, 26° D, 89°. (b) Final product distribution at 0° over A, unsintered film B, film sintered at 196°. 

Pinal distributions from the reaction of cyclohexene with deuterium over palladium films have been briefly reported (52). 

The reaction of cyclohexene with deuterium over a gold film between 150 and 240° produces a stepwise exchange reaction and a little hydrogenation (63). 

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