Structure of µ-fluoro-bis[bis(2,2′-bipyridyl)fluoronickel(II)] fluoride–ethanol (1/2) trihydrate, revealing several unique features including strong hydrogen bonds between fluoride ions and ethanol molecules

Abstract

The crystal structure of the compound [(bipy)₂FNi–F–NiF(bipy)₂]⁺[F(EtOH)₂(H₂O)₂]^–·H₂O (bipy = 2,2′-bipyridine) has been determined, providing examples of three different and rare fluoride environments: ligand, bridging, and ethanol-solvated ion. The ligand fluorides are linked by hydrogen bonding to the same water molecule and the torsion angle between them is 65°. The lattice fluoride ion is hydrogen bonded strongly to two ethanol molecules with R(F ⋯ O)= 2.579 Å and to two water molecules with R(F ⋯ O)= 2.709 Å.