(Tetraphenylporphyrinato)hafnium(IV) Diacetate Acetonitrile Solvate

The title metalloporphyrin bis(acetato-O,O')[5,10,15,20-tetraphenyl-21H,23H- porphinato(2-)-N²¹,N²²,N²³,N²⁴]hafnium acetonitrile solvate [Hf(C₂H₃O₂)₂(C₄₄H₂₈N₄)].CH₃CN, crystallizes in the space group C2/c with Z = 4. The complex has twofold crystallographic symmetry. The two acetate ligands are coordinated in a mutually cis configuration and the geometry about the hafnium center approximates a square antiprism. The distance of the Hf atom from the porphyrin plane is 1.033 (5) Å. The average Hf-N and Hf-O bond distances are 2.26 (2) and 2.25 (3) Å, respectively. The bite angle of the diacetate (C_carbonyl-Hf-C_carbonyl) and average N-Hf-N(-x + 1, y, -z + ) angles are 83.8 (4) and 125.7 (4)°, respectively.

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