| Summary: | In the title compound, [Hf(C9H6NO)4]·2C7H8, the hafnium metal centre is coordinated by four N,O-donating bidentate quinolin-8-olate ligands arranged to give a square-antiprismatic coordination polyhedron with a slightly distorted dodecahedral geometry. The average Hf—O and Hf—N distances are 2.096 (3) and 2.398 (3) Å, respectively, and the average O—Hf—N bite angle is 70.99 (11)°. The crystal packing is controlled by π–π interactions between quinoline ligands of neighbouring molecules and hydrogen-bonding interactions. The interplanar distances vary between 3.138 (1) and 3.208 (2) Å, while the centroid–centroid distances range from 3.576 (1) to 4.074 (1) Å.
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