The Efficiencies of Hydrocarbons and Hydrogen in Quenching Triplet Cadmium Atoms

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Abstract
The relative efficiencies of sixteen hydrocarbons and of hydrogen in quenching triplet cadmium atoms have been measured at 270±1°C by the competitive quenching method, using the cadmiumphotosensitized cis-trans isomerization of cis-2-butene as a detector reaction. The quenching efficiencies of all the olefins studied and of acetylene were almost the same. The efficiencies of saturated hydrocarbons were, however, very low compared with those of unsaturated ones. Hydrogen was as efficient as unsaturated hydrocarbons.