in 2-methyl cyclohexane Irradiation (UV/VIS); photolysis of soln. of hexakis(2,4,6-triisopropylphenyl)cyclotristannane in methylcyclohexane at -78°C using Hanovia high-pressure lamp;

in toluene (inert atmosphere); heating the cyclotristannane in toluene to 60°C, addn. of the diazabutadiene in toluene, stirring (2 h); evapn. (vac.), dissoln. (n-pentane), filtration, cooling to -18°C, filtration, concn., crystn. to -18°C, recrystn. (n-pentane); elem. anal.;

Irradiation (UV/VIS); photolysis at -78°C;

in not given warming to 0°C; detn. of thermal equilibrium between tristannane and distannene by UV and 1H-NMR-spectroscopy;