Edward E. Flagg

Some fluoroalanes and related intermediates

Abstract Fluoroalanes, AlFnX3−n·m(THF), and related intermediates, AlYn[OCH(CH3)2]3−n·m(THF), [XCl, Br, I, OCH(CH3)2; YH, Cl; n = 1,2; m = 0–2], were prepared and studied. Monofluoroalanes were isolated as bis(tetrahydrofuran)dihalofluoroalanes, AlFX2·2 THF); the notable exception was nonsolvated AlF[OCH(CH3)3]2. The corresponding difluoroalanes were less solvated but still tractable. Molecular weight determinations in THF indicated that difluoroalanes were more polymeric (D.P. 4–14) than the corresponding monofluoroalanes. Infrared and NMR data were consistent with fluorine bridged bonding especially for the difluoroalanes.