Crystal structure of dimethyltin bisfluorosulphate

Abstract

Crystals of dimethyltin bisfluorosulphate, Me₂Sn(SO₃F)₂, are monoclinic, a= 7·813(2), b= 8·399(2), c= 8·143(2)Å, β= 117·13(2)°, Z= 2, space group P2₁/c. The structure was determined with Mo-K_α 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)Å, and four oxygen atoms, Sn–O 2·24(1)Å. The SO₃ F group does not deviate significantly from C_3v symmetry, and has the mean dimensions, S–O 1·47(1), S–F 1·56(1)Å, O–S–O 112, and F–S–O 107°.