Channel-forming solvates of 6-chloro-2,5-dihydroxypyridine and its solvent-free tautomer 6-chloro-5-hydroxy-2-pyridone

mer-Hydridotris(trimethylphosphane-κP)(D-valinato-κ2N,O)iridium hexafluoridophosphate dichloromethane 0.675-solvate

The title compound, [Ir(C₅H₁₀NO₂)H(C₃H₉P)₃]PF₆·0.675CH₂Cl₂, an iridium compound with a meridional arrangement of PMe₃ groups, O,N-bidentate coordination of d-valine and with a hydride ligand trans to the N atom is compared with the l-valine complex reported previously. As expected, the complexes from the corresponding l and d isomers of valine crystallize in enanti­omorphic space groups (P4₃ and P4₁, respectively). In the crystal, N—H⋯O and N—H⋯F hydrogen bonding is observed, the N—H to carbonyl oxygen hydrogen bond producing a helical motif that proceeds along the 4₁ screw of the c axis.