Synthesis, Characterization and Crystal Structures of Novel Hafnium Porphyrins

Article abstract of DOI:10.1039/DT9930000205

Dichlorohafnium porphyrin complexes which are potentially useful precursors for various hafnium porphyrin complexes, were synthesised and characterized.The structure of Hf(oep)Cl2(H2O)> has been determined by X-ray crystallography; the co-ordination geometry around the Hf atom can be described as a 4:3 piano-stool with the square base occupied by the porphyrin N atoms and the legs by the two Cl atoms and a water molecule.Treatment of with n4>3 gave n4> (por = oep and tpp).The crystal structure of the oep complex revealed a seven-co-ordinate Hf atom surrounded by 4 N atoms of the porphyrin and 3 O atoms of the P3O9(3-) ligand.The N4 and O3 planes are almost parallel and the Hf atom is located 1.007 Angstroem above the N4 plane and 1.476 Angstroem below the O3 plane.Crystal data for *C6H6: triclinic, space group <*>, a = 11.977(2), b = 12.261(1), c = 14.677(2) Angstroem, α = 76.74(1), β = 85.41(1), γ = 74.41(1) deg, Z = 2; R = 0.081 and R' = 0.092 for 3325 independent reflections with I > 3?(I).Crystal data for n4>*2CHCl3: monoclinic, space group P2₁/n, a = 15.490(2), b = 19.133(1), c = 22.761(4) Angstroem, β = 99.425(7) deg, Z = 4; R = 0.036 and R' = 0.037 for 4823 independent reflections with I > 3?(I).

Full text of DOI:10.1039/DT9930000205

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