in chloroform-d1 byproducts: bibenzyl, PhCH2CDCl2; Irradiation (UV/VIS); soln. of the stannane in CDCl3 was purged by N2 and irradiated with the light from an excimer laser (308 nm); analogous irradn. in C6D6 yields mainly bibenzyl and polystannanes, mechanism of the photoreaction is proposed; (1)H NMR study;