in tetrachloromethane; dichloromethane solution of ICl (1.32 mmol) in CCl4 was added dropwise (0,5 h) to a stirred solution of tin compound (1.26 mmol) in 1/4 CH2Cl2/CCl4 at room temperature; reaction was monitored by (1)H-NMR spectroscopy; solvent was removed under reduced pressure; pink residue kept under vacuum for 3 h; product was identified by comparison of its spectra with an authentic sample;