Synthesis and crystal structure of a novel tetraiminediphenolate iron(II) macrocyclic complex: A six-coordinate iron–protein model

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A novel tetraiminediphenolate iron(II) macrocyclic complex [Fe(tidf)(CH3OH)2](NO3)2(1) has been prepared and characterized by microanalysis, X-ray crystallography, FTIR spectroscopy, and mass spectrometry. The crystal structure (monoclinic, space group C2/c, Z=8, a = 26.8573(6) Å, b = 10.6551(4) Å, c = 23.5371(7) Å, β = 107.450(2)°) shows that the iron(II) occupies a distorted octahedral geometry with two methanol molecules bound axially. The macrocyclic ligand is very flexible and adopts a butterfly conformation with a dihedral angle of 112°.

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