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Describes a kinetic procedure for measuring the photochemical quantum efficiencies of reactions in which several components have overlapping absorbances. Suitability of the method for photochemical determinations where inner filter effects are substantial; Quantitative measurement of the Si-H bond activation photochemistry of (eta5-C5H5)Rh(CO2) in triethylsilane solution.

The quantitative photochemistry of the platinum organometallic complex, Cp'Pt(CH3)3 (Cp' = η5-C5H4CH3), has been investigated in methylcyclohexane and n-pentane solutions at 293 K following UV irradiation into the lowest lying absorption bands. Absolute photochemical quantum efficiency (φcr) results obtained for Cp'Pt(CH3)3 at 313 and 366 nm reveal that the system very effectively photoreacts with φcr = 0.34-0.41 in these solvents and 0.79-0.85 when 53 mM Et3SiH is incorporated. These photoefficiencies indicate that the quantitative photochemistry is 2 orders of magnitude higher than previously recognized. The application of Cp'Pt(CH3)3 as an effective photoinitiator for hydrosilylation reactions involving vinyl/hydride silicone mixtures is demonstrated. [ABSTRACT FROM AUTHOR]

Studies the quantitative photochemistry of n5-C5H5)Fe(Co)2I in room-temperature solution, involving heterolytic cleavage of iodides. Name of the most effective photoconversions; Suggestion that long-wavelength irrigation provides a valuable way of effecting heterolytic Fe-I dissociation; Indepth look at carbonyl complexes.

Presents a paper which examined quantitative photochemical measurements for W(CO)4(en) (en=ethylenediamine). Information on the photolysis procedures; Discussion on the electronic spectra; Results on the quantum.