Abstract
Crystals of dimethyltin bisfluorosulphate, Me2Sn(SO3F)2, are monoclinic, a= 7·813(2), b= 8·399(2), c= 8·143(2)A, β= 117·13(2)°, Z= 2, space group P21/c. The structure was determined with Mo-Kα diffractometer data by Patterson and full-matrix least-squares methods, the final R being 0·036 for 643 observed reflexions. The structure consists of polymeric sheets parallel to (100), with the fluorosulphate groups acting as bridging ligands between linear dimethyltin units. The tin atom is octahedrally co-ordinated to two methyl groups, Sn–C 2·08(1)A, and four oxygen atoms, Sn–O 2·24(1)A. The SO3 F group does not deviate significantly from C3v symmetry, and has the mean dimensions, S–O 1·47(1), S–F 1·56(1)A, O–S–O 112, and F–S–O 107°.
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