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IX-H-14. Quantum yields of the acetone product formed in the photodecomposition of ferf-butyl nitrite .

IX-H-15. Quantum yields of acetone products formed in the photolysis of terf-hutyl nitrite at 253.7 nm as a function of added nitrogen or ethane gases data from McMiUan .

IX-H-16. Photolysis frequencies as a function of solar zenith angle for te t-C4H90N0 photodecomposition on a cloudless day in the lower troposphere with an overhead ozone column

IX-H-17. Comparison of the absorption cross sections for nitromethane and nitroethane with that for acetone.

IX-H-18. Comparison of the absorption cross sections for a series of halogen-atom-substituted nitromethane molecules. Data for CH3NO2 from Calvert and Pitts .

IX-H-19. Comparison of the absorption spectra of , CH3NO2, and CF3NO2. The region of absorption of the RNO compounds results in a rare characteristic

IX-H-2. Comparison of the absorption spectrum of HONO as measured by several groups Stockwell and Calvert .

IX-H-20. Absorption spectrum of dimethylnitrosoamine. The data reported by Lindley .

IX-H-21. Photolysis frequencies for CHs jNNO as a function of solar zenith angle. Calculations were made for clear-sky conditions in the lower troposphere with an overhead ozone column of 350 DU.

IX-H-3. Photolysis frequencies for HONO in the lower troposphere as a function of solar zenith angle

IX-H-5. Comparison of the approximate absorption spectra for some simple alkyl nitrites and the wavelength distribution of the solar flux for an overhead Sun within the lower troposphere. The estimates shown were made by the current authors using relative spectral data of Heicklen .

IX-H-6. Quantum yields of formation of CH3CHO in the 366 nm photolysis of ethyl nitrite .

IX-H-7. Approximate photolysis frequencies for CH3CH2ONO versus solar zenith angle as estimated for a troposphere with an ozone column of 350 DU.

IX-H-8. Quantum yields of products in the photolysis of iso-propyl nitrite-NO mixtures at 26 C as a function of wavelength data of Ludwig and McMiUan .

IX-H-9. Estimated quantum yields of the primary processes in wo-propyl nitrite as a function of wavelength based on the data of Ludwig and McMiUan the absorption cross sections for iso-propyl nitrite are shown for comparison by the gray curve.

IX-H-I I. Approximate photolysis frequencies for n-C3H70N0 as a function of solar zenith angle as calculated for a cloudless day in the lower troposphere with an overhead ozone column of 350 DU.

IX-I-1. Cross sections .

IX-I-2. Quantum yields of the primary processes in HONO2 photodecomposition. The total quantum yields of photodecomposition, given by the 4 no2 estimates of Johnston et al. are near unity over the entire absorption region. The primary process

IX-I-3. Comparison of photolysis frequencies for HONO2, HOONO2, and several organic nitrates versus solar zenith angle calculated for a cloud-free lower troposphere with an overhead ozone colurtm of 350 DU.

IX-I-I I. Comparison of the absorption spectrum for HOCH2CH2ONO2 and the structurally related ethyl nitrate, CH3CH2ONO2-

IX-I-I2. Photolysis frequencies for some multifunctional organic nitrates versus solar zenith angle. Data calculated for clear, lower tropospheric skies with an overhead ozone column of 350 DU. The primary quantum yield of photodissociation is assumed to be unity.

IX-I-IO. Comparison of the absorption cross sections of the 2-oxo-cyclohexyl-l-nitrate with those of the structurally related eyclopentyl nitrate.

IX-J-1. Absorption cross sections as a function of wavelength

IX-J-2. Estimated quantum yields of the primary processes in CH3C.

IX-J-3a. Plot of the approximate photolysis frequencies for peroxyacetyl nitrate photodecomposition as a function of solar zenith angle for a cloudless day within the troposphere with an overhead ozone column of 350 DU figure from Calvert et al. .



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