Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

Products of (a) allyl radical interaction with unheated Co₃O₄, (b) thermally activated 1,5-hexadiene or thermally activated allyl bromide with unheated Co₃O₄, (c) moderately heated Co₃O₄ with unheated 1,5-hexadiene or allyl bromide were studied under Knudsen flow conditions. Cobalt suboxide Co₃O₄, a typical catalyst of deep oxidations yielded acrolein in reaction with allyl radicals as early as at the room temperature of the catalyst. A similar acrolein formation was also observed in the allyl radical interaction with other oxides exhibiting different catalytic properties. It appears that acrolein is in general the primary product of the allyl radical interaction with the oxides. The results are discussed and compared with previous data obtained with MoO₃.