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• W2010052466 abstract "The reactions between cyclopropane or methylcyclopropane and deuterium have been studied over evaporated films of platinum, palladium, nickel, rhodium, tungsten, and iron. Deuterocycloalkanes were formed only over tungsten, and this exchange proceeded very largely in the absence of multiple exchange. In addition to this exchange, deuteroalkanes from ring opening were also formed. Over platinum and palladium, only deuteroalkanes from ring opening were found, but over nickel and iron, this was accompanied by lower deuteroalkanes from more extensive fragmentation. On all metals, no deuteroalkane from ring opening was produced with less than two deuterium atoms per molecule. In the exchange of methylcyclopropane over tungsten, the hydrogens of the methyl group remained inert even at high conversions, and the methyl group had but little effect on the exchange reactivity. However, the deuteroalkanes formed by ring opening over tungsten were produced by extensive multiple exchange that included the methyl group. It is concluded that in all cases cycloalkane adsorption occurred to give a π-bonded precursor, that ring opening occurred from this to give a σ-bonded 1,3-diadsorbed species, and that from the latter were formed the deuteroalkanes. In the case of tungsten, the π-bonded precursor could alternatively form a σ-bonded monoadsorbed cycloalkyl residue which was responsible for the formation of deuterocycloalkanes. Over palladium and rhodium the distribution of deuteroalkanes from ring opening closely resembled the distribution produced by the exchange of the corresponding alkane. On the other hand, over tungsten and nickel the deuteroalkane from ring opening had a much higher mean deuterium number than the corresponding product from alkane exchange. An explanation is offered for this behavior in terms of the differing surface deuterium concentrations in the two reactions resulting from the relatively stronger cycloalkane adsorption. An explanation is offered for the formation of deuteroalkanes from the reaction on iron, despite the known absence of alkane exchange on this catalyst." @default.
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• W2010052466 date "1967-05-01" @default.
• W2010052466 modified "2023-09-23" @default.
• W2010052466 title "The reaction of deuterium with cyclopropane and methylcyclopropane over evaporated metal films" @default.
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• W2010052466 doi "https://doi.org/10.1016/0021-9517(67)90281-3" @default.
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