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IX-J-3c. Plot of the photolysis frequency for CH3C.

IX-J-3d. Plot of the spectral -values for CH3C.

IX-J-4. Plot of the approximate photolysis frequencies for peroxypropionyl nitrate .

IX-K-1. Comparison of the absorption cross sections for a number of compounds containing an O—O bond. Spectral data are from lUPAC recommendations.

IX-K-2. Photolysis frequencies for a series of peroxy compounds

IX-K-3. Comparison of the absorption cross sections for methyl hydroperoxide .

IX-L-12. 2-Nitrobenzaldehyde photolysis frequencies as a function of solar zenith angle for clear lower tropospheric skies at 0.5 km altitude and an ozone column of 350 DU the results shown were calculated using the measured solution phase cross sections, and a quantum yield of photoisomerization of 0.5 figure from Calvert et al. .

IX-L-13. Absorption cross sections for the long wavelength band in nitrobenzene as measnred in ethanol solntion .

IX-L-14. Nitrobenzene photolysis frequencies as a function of solar zenith angle for clear skies in the lower troposphere, 0.5 km altitude and an ozone column of 350 DU data were calculated using the solution phase absorption spectrum and quantum yield of decomposition typical of the nitronaphthalenes .

IX-L-16. 2-Methyl-1-nilronaphthalene photodissodation coefficients at 0.5 km altitude as a function of solar zenith angle, using measured solution-phase cross sections and an assumed quantum yield of decomposition of 3.5 x 10 in order to obtain a match between the calculations

IX-L-17. Cross sections as a function of wavelength for phenol vapor . Actinic flux is given by the heavy gray curve as a function of wavelength in the lower troposphere for an overhead Sun.

IX-L-18. Cross sections as a function of wavelength for gaseous o-cresol . Actinic flux is given by the heavy gray curve as a function of wavelength in the lower

IX-L-19. Absorption cross sections for a series of HO-substituted aromatic hydrocarbons, phenol, 2-hydroxynaphthalene, and 3-hydroxyphenanthrene as measured in nonpolar solvents . Actinic flux is given by the heavy gray curve as a function of wavelength in the lower troposphere for an overhead Sun.

IX-L-2. Cross sections versus wavelength for benzene oxide oxepin and toluene oxide 2-methyloxepin data from Klotz et al. temperature, 298 K.

IX-L-20. Approximate -values for the rate of formation of excited singlet state molecules, estimated for 2-hydroxynaphthalene as measured in ethanol solutions actinic flux data are for a cloudless sky in the lower troposphere with an overhead ozone column of 350 DU.

IX-L-21. Plot of the cross sections for some nitro-substituted phenols measurements were made in ethanol solutions .

IX-L-3. Estimated photolysis frequencies for the photodecomposition at 0.5 km altitude as a function of solar zenith angle using the measured value of yXCsHfiOf jXNO

IX-L-4. Comparison of the cross sections measured for benzaldehyde in the gas phase and in solution.

IX-l-4a. Calculated photolysis frequencies for CH3ONO2 as a function of solar zenith angle and overhead ozone column. The cross sections of Roberts and Fajer .

IX-l-4b. Percentage decrease in the j-valnes of CH3ONO2 expected per Dobson unit increase in the overhead ozone column. Data were calculated for a cloudless day within the lower troposphere figure from Calvert et al. .

IX-l-4d. Plot of the estimated photolysis frequency for CH3ONO2 as a function of altitude for a cloudless day with solar zenith angle 45 and vertieal ozone eolumn 350 DU. Shown as well is the temperature variation with altitude that was employed in the calculations .

IX-l-5. Comparison of the absorption cross sections of a number of multifunctional nitrates reported by Barnes et al. the wavelength distribution of the actinic flux in the lower troposphere for an overhead Sun is shown by the gray curve.

IX-L-5. Stem-Volmer plots of the quantum yields of benzene and CO products formed in the photodecomposition of benzaldehyde at 276 nm .

IX-L-6. Approximate quantum yields for the photodecomposition of benzaldehyde as estimated in this work. The absorption spectrum of benzaldehyde is shown by the gray curve.

IX-l-7. Comparison of the absorption cross sections of 1,2-butandiol dinitrate with those of the structurally related n- and ec-butyl nitrates.



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