title: The structure of trimethyltin fluoride.
abstract: The solid-state structure of (CH3)3SnF was reinvestigated by X-ray diffraction techniques as well as by multi-nuclear solid-state NMR spectroscopy. Trimethyltin fluoride crystallizes from hot ethanol in the orthorhombic space group Pnma at room temperature and changes to a low-temperature orthorhombic phase (space group: Cmcm) below -70 °C. In both modifications, trimethyltin fluoride adopts a linear chain structure with symmetric fluorine bridges, in contrast to previous reports. During its synthesis, (CH3)3SnF precipitates in another, poorly crystalline modification, as shown by powder X-ray diffraction. Solid-state MAS NMR experiments of both room-temperature phases of (CH3)3SnF (non-recrystallized and recrystallized) were carried out for the (1)H, (13)C, (19)F, and (119)Sn nuclei. The (119)Sn{(19)F, (1)H} and (19)F{(1)H} NMR spectra offer unambiguous determination for the (19)F and (119)Sn shielding tensors. The (119)Sn{(1)H} solid-state NMR spectra are in agreement with pentacoordination of Sn in this compound for the non-recrystallized and the recrystallized modifications. Based on the solid-state NMR results, the non-recrystallized modification of (CH3)3SnF also consists of linear, symmetrically fluorine-bridged chains, and differs from the recrystallized orthorhombic phase only in packing of the chains.
authors: Department of Chemistry and Biochemistry and the Canadian Centre for Research in Advanced Fluorine Technologies, University of Lethbridge, Lethbridge Alberta, T1K 3M4, Canada. michael.gerken@uleth.ca paul.hazendonk@uleth.ca.
authors: Praveen
authors: P
authors: Chaudhary
authors: Department of Chemistry, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T2N2, Canada.
authors: Mario
authors: M
authors: Bieringer
authors: Department of Chemistry and Biochemistry and the Canadian Centre for Research in Advanced Fluorine Technologies, University of Lethbridge, Lethbridge Alberta, T1K 3M4, Canada. michael.gerken@uleth.ca paul.hazendonk@uleth.ca.
authors: Paul
authors: P
authors: Hazendonk
authors: Department of Chemistry and Biochemistry and the Canadian Centre for Research in Advanced Fluorine Technologies, University of Lethbridge, Lethbridge Alberta, T1K 3M4, Canada. michael.gerken@uleth.ca paul.hazendonk@uleth.ca.
authors: Michael
authors: M
authors: Gerken