Abstract
The spectrum of the intermediate product ascribed to nitrosopentane has been detected in the photolysis of the SO2–pentane (RH)–NO mixture. This result has been interpreted in terms of the radical mechanism by assuming the H-atom abstraction from RH by the excited SO2 molecules to be the primary act. The contribution of the singlet and triplet SO2 states to the product formation rate and the ratio of the singlet-to-triplet rate constants have been evaluated. At NO pressures above 5 torr, the product formation rate significantly deviates from the Stern–Volmer dependence.
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