mercury dichloride in the cold;;

zinc in tetrahydrofuran; water under N2, at room temp., cosolvent media: H2O(NH4Cl)/THF/Zn, the alkyl tin halide was added in solvent mixt., the mixt. was maintained under N2 flow, reaction time: 24 h; Zn was filtered off, aq. phase was extd. with n-pentane, solvent was removed from organic phase, residue was distilled under vac.; (119Sn NMR monitoring);

zinc in tetrahydrofuran; water under N2, at room temp., cosolvent media: H2O(NH4Cl)/THF/Zn, the alkyl tin halides were added in solvent mixt., the mixt. was maintained under N2 flow, reaction time: 22 h; Zn was filtered off, aq. phase was extd. with n-pentane, solvent was removed from organic phase, residue was distilled under vac.; (119Sn NMR monitoring);

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in the cold;;