The photolysis of dichlorotriphenylbismuth(V) in chloroform.
Under 254 nm irradiation in chloroform, Bi(C6H5)3Cl2 reacts to yield HBiCl4 and H2BiCl5, in contrast to its behavior in acetonitrile, in which bismuth metal appears to be the eventual product, unless anhydrous HCl is present, in which case H2BiCl5 is also formed. The photolysis in CHCl3 is not significantly solvent-initiated. The rate depends directly on the light intensity absorbed by the metal complex, and the quantum yield is 0.026. In CCl4 a portion of the reaction occurs through absorption of light by the solvent.
Effet du rayonnement γ du cobalt-6o sur le diphenyl-mercure et le triphenyl-bismuth en solution dans le benzene et le chloroforme
Resume enThe effects of 60 Co 〉 radiation on solutions of diphenylmercury and triphenylbismuth in benzene and chloroform are described. Radiation sensitivity is greater for Ph 2 Hg. In benzene, the radiolytic decomposition leads to the metal and free radicals whereas in chloroform organometallic halides PhHgCl and Ph 3 BiCl 2 are formed. In the latter case, reaction occurs through the radiolytic products of the solvent.
Computer simulations and theory of oceanographic fluorescence lidar signals: effect of sea surface structure.
A 3-D computer simulation model has been developed using geometrical optics suitable for analyzing the effect of sea surface structure on oceanographic fluorescence lidar signals. Depth-resolved and depth-integrated signals reveal a considerable dependence on the surface structure. The results obtained by simulation are confirmed by a theoretical approach based on the transformation of solid angles by curved boundaries. Using statistical assumptions about the distribution of curvatures of the ocean surface, a general expression for this influence is found.