Tetra­kis(5,7-dimethyl­quinolin-8-olato-κ(2) N,O)hafnium(IV) dimethyl­formamide disolvate

In the title compound, [Hf(C(11)H(10)NO)(4)]·2C(3)H(7)NO, the Hf(IV) atom is coordinated by four N,O-donating bidentate 5,7-dimethyl-8-quinolino­late (Ox(−)) ligands arranged to give a distorted square-anti­prismatic coordination polyhedron. The average Hf—O and Hf—N distances are 2.098 and 2.298 Å, respectively, and the average O—Hf—N bite angle is 70.2°. The crystal packing is controlled by π–π inter­actions between Ox(−) ligands of neighbouring mol­ecules, giving rise to a three-dimensional supra­molecular grid network. The inter­planar distances vary from 3.441 (1) to 3.509 (1) Å, while the centroid–centroid distances vary from 3.688 (2) to 3.759 (12) Å. A non-classical C—H⋯O hydrogen bond is observed between the complex and one of the solvate mol­ecules.