In the title compound, C16H16O7, the dihedral angle between the two benzene rings is 82.02 (7)°. The crystal structure is stabilized by inter­molecular O—H⋯O hydrogen bonds, which link the mol­ecules into a two-dimensional network.

The crystal structure of the title compound, [CuI(C10H8N2)2]I3, has been reported previously [Freckmann & Tebbe (1981), Acta Cryst. A37, C‐228], but full results were not published. The cation and anion possess crystallographically imposed C2 and Ci symmetry, respectively. The CuII atom is coordinated by four N atoms of two bidentate 2,2′‐bipyridine ligands and one I atom in a distorted trigonal–bipyramidal geometry. The I atom occupies an equatorial position. In the crystal packing, the aryl rings of adjacent bipyridine ligands stack along the c axis to form zigzag chains, with C⋯C and C⋯N separations in the range 3.365–3.713 Å.

No abstract