lithium aluminium tetrahydride; n-butyllithium in tetrahydrofuran; water under N2; n-BuLi in n-hexane added to soln. of thiophenol in TMEDA at 0°C; refluxed (2 h); Se added at 0°C; stirred (room temp.,6h); solvent removed; dissolved in THF; treated with LiAlH4(3 h), ice-cold water and then with Me2SnCl2 in H2O; stirred for 30 min at room temp.; extd. with CH2Cl2; dried with anhyd. Na2SO4; solvent removed under reduced pressure; purified by column chromy. (silica gel, CCl4-CHCl3); elem. anal.;