Crystal structure of an ordered WOF 5 − salt: (1,10-phen-H)WOF 5 (1,10-phen = 1,10-phenanthroline)

摘要

Crystals of 1,10-phenanthrolinium penta­fluorido­oxidotungstate(VI), (1,10-phen-H)WOF5 (1,10-phen = 1,10-phenanthroline, C12H8N2), were obtained upon hydrolysis of WF6(1,10-phen) in CH3CN at 193 K. The (1,10-phen-H)WOF5 salt contains a rare example of a WOF5− anion in which the oxygen and fluorine atoms are ordered. This ordering was verified by bond-valence determinations and structural comparisons with Xe2F11WOF5 and Lewis acid-base adducts of WOF4 with main-group donor ligands. The crystal packing is controlled by N—H⋯F hydrogen bonding that is directed exclusively to the axial F atom as a result of its increased basicity caused by the trans influence of the oxido ligand.