Photolysis of Nitrous Oxide at 1470 Å

Abstract

Nitrous oxide, in the pressure range of 1–760 torr, has been photolyzed at 1470 Å. The rates of N2, O2, and NO formations are independent of the N2O pressure. The quantum yields are φN2=1.40±0.02, φO2=0.58±0.03, and φNO=0.78±0.03. A reaction scheme for the photodecomposition of nitrous oxide is given, and a quantitative correlation of the observed product yields with those expected from the proposed mechanism is demonstrated.

Gas-phase radiolysis of nitrous oxide. Effect of the addition of several hydrocarbons

“…Besides, the ratio of the two reactions assumed here is not inconsistent with the conclusion of Yang and Servedio. 22 The Journal of Physical Chemistry, Vol. 75, No.…”

Vacuum-Ultraviolet Photodecomposition of Stannane

“…This lamp produces resonance radiation at 147 nm (98%) and 130 nm (2%). The intensity of the lamp on the reaction mixture was determined before each photolysis by observation of the decomposition rate of N 2 O, which has an absorption cross section of 5.0 × 10 -18 cm 2 and a quantum yield for decomposition of 1.7 − at 147 nm. The average photon flux on the reaction mixture through a freshly cleaned window was 2.6 × 10 14 photons/cm 2 ·s.…”

“…While the proposed mechanism is most probably not unique, it does account in a rational manner for all of the observed products, and the kinetic quantities derived from it are in sufficient agreement with accepted values as to attest, at the very least, to its internal consistency. Φ(Sn 2 H 6 ) NO ) (3φ 8 + 5φ 9 ) ( k 17 [M] k 16 + k 17 [M] ) (31) Φ ) (30)…”

Photochemistry in the Far Ultraviolet

“…Relatively few determinations of the quantum yields of the endproducts formed in the far uv photolysis of N20 have been carried out in recent years (77)(78)(79), although a frequently used actinometer involves a measurement of the yield of the N2 product. It seems to be rather well established that «P(N2) = is still uncertain.…”