in dichloromethane (inert atmosphere); stirring (-78°C to room temp.); removal of CH2Cl2 and trapping Me3SnCl at -78°C by applying high vacuum, NMR monitoring;

in benzene (N2); standing (overnight); solvent removing (vac.), extn. (pentane), filtn., 3days, room temp., filtn.; elem. anal.;

in not given pptn. of (t-Bu2Sn)4, crystn. of other products after hydrolyse of Grignard-compd. and concn. of organic phase; elem. anal.;

NaOH in toluene refluxing;

in diethyl ether byproducts: (t-BuP)4; to a suspn. of K2(t-BuP)2*0.5THF in diethyl ether a soln. of (t-Bu)2SnCl2 is dropwise added at room temp. for 20 min with stirring, mixt. is stirred for another 20 minutes (Ar); ppt. is sucked off, the volume of filtrate is reduced absolutely, residue is taken off with n-pentane and the insoluble parts are filtered off by washing with n-pentane twice, the filtrates are collected and ppt. iscrystd. at -30°C, elem. anal.;

in tetrahydrofuran; pentane byproducts: (t-BuP)4; to a suspn. of freshly prepared K2(t-BuP)2*0.5THF in n-pentane a soln. of (t-Bu)2SnCl2 in THF is dropwise added with stirring at -78°C, mixt. is stirred for another 30 min at the same temp. (Ar); mixt. is filtered off, solvent of filtrate is evapd. at -30 to -40°C at 1E-3 Torr, ppt. is recrystd. from n-pentane at -78°C, washed twice with cold pentane and dried at 0°C in high vac., elem. anal.;

in tetrahydrofuran; pentane byproducts: (t-BuP)4; to a suspn. of freshly prepared K2(t-BuP)2*0.5THF in n-pentane a soln. of (t-Bu)2SnCl2 in THF is dropwise added with stirring at -78°C, mixt. is stirred for another 30 min at the same temp. (Ar); mixt. is filtered off, solvent of filtrate is evapd. at -30 to -40°C at 1E-3 Torr, ppt. is recrystd. from n-pentane at -78°C, washed twice with cold pentane and dried at 0°C in high vac., elem. anal.;

in acetone byproducts: HCl, NaCl; an equimol. soln. of NaHSe is slowly added dropwise to a soln. of (C4H9)2SnCl2 in small amt. of acetone under inert conditions; the ppt. is filtered, washed and recrystd. from acetone, elem. anal.;

in acetone byproducts: HCl, NaCl; an equimol. soln. of NaHTe is slowly added dropwise to a soln. of (C4H9)2SnCl2 in small amt. of acetone under inert conditions; the ppt. is filtered, washed and recrystd. from acetone, elem. anal.;

in chloroform (Ar); using Schlenk techniques; reflux of mixt. of (((CH3)3C)2SnS)2 and ((CH3)3C)2SnCl2 in CHCl3 for 12 h; slowly evapn. of solvent, not isolated, detected by NMR;