Hydrogenolysis of the
propellanes tricyclo[4,4,1,01,6]undecane and tricyclo[4,3,1,01,6]decane
gives similar stereochemical ratios of products for reactions carried out
either in acetic acid solution with a platinum oxide catalyst or over supported
metal catalysts in the vapour phase. Almost equal amounts of cis- and trans-1- methylbicyclo[4,4,0]decanes
are formed from the former, whereas cis-1- methylbicyclo[4,3,0]nonane
predominates from reaction of the tricyclodecane. It is proposed that reaction
of the highly strained propellanes over metal catalysts involves metal
insertion reactions even for reactions over platinum in acetic acid solution.
Deuterium incorporation studies are described which support this proposal.
Low Temperature Hydrogen Production by Ethanol Steam Reforming over Supported Metal Catalysts in an Electric Field