tert.-butyl lithium in benzene Irradiation (UV/VIS); mixt. of mercurial and organometallic compd. (1 equiv) is irradiated in nitrogen-purged solvent in Pyrex tube with 350-nm Rayonet photoreactor for 24 h; mixt. is poured into water, extd., extract is washed twice with aq. sodium thiosulfate, dried over anhyd. Na2SO4, concd.; GLC;

in tetrahydrofuran; benzene Irradiation (UV/VIS); mixt. of mercurial and organometallic compd. (2 equiv) is irradiated in nitrogen-purged solvent in Pyrex tube with 350-nm Rayonet photoreactor for 5 h; mixt. is poured into water, extd., extract is washed twice with aq. sodium thiosulfate, dried over anhyd. Na2SO4, concd.; GLC;