Abstract
The rates of production of HD in the photolysis of C2H6+C2D6 at 1470 and 1236 Å at temperatures sufficiently high to eliminate internal scavenging have been used as a measure of the relative importance of molecular elimination and atomic elimination processes. This, together with complete product analysis including isotopic determinations, gives the following relative weights for the primary processes 1470 Å1236 ÅC2H6*→H2+C2H4†1.001.00C2H6*→2H+C2H40.150.88C2H6*→CH4+CH20.020.50.The probability of dissociation of C2H4† into H2 and C2H2 increases relative to collisional stabilization by a factor of about 2 when the energy of the exciting photon is increased from 1470 to 1236 Å.
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