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The porphyrins pack in pairs of chains also perpendicular to and alternating concave up and concave down along a chain. The core is substantially distorted from planarity by a combination of both ruffling and saddling. Robert Scheidt and Bruce C. The small size of the central hole is the result, at least in part, of the core conformation in [Fe TPPBr 4 py 2 ]. Two effects are possible with this porphyrin ligand:

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The porphyrins pack in pairs of chains also perpendicular to and alternating concave up and concave down along a chain.

Bis (pyridine) (2,3,12,tetrabromo-5, 10, 15, tetraphenylporphyrin) iron (II) pyridine solvate

Program s used to refine structure: However, small differences 1. Comment The title compound [Fe TPPBr 4 py 2 ] is a low-spin bis pyridine iron II complex that was studied as part of a program of ways to achieve control of axial ligand orientation in iron porphyrin derivatives Safo et al.

Services for accessing these data are described at the back of the journal. The core is substantially distorted from planarity by a combination of both ruffling and saddling. Single crystals were obtained by liquid diffusion of hexane into a CH 2 Cl 2 solution. The deformation shows asymmetry because of the two types of pyrrole rings leading to overall core symmetry of C 2 and not S 4.

Thus, all pyridine atoms were refined as C and the three associated H atoms were included at 0. Open in a separate window. Software used to prepare material for publication: Only slight asymmetry, 0. Scattering factors from International Tables for Crystallography Vol.

The perchlorato- and chloroiron III derivatives were prepared by modified literature methods Alder et al. The title compound [Fe TPPBr 4 py 2 ] is a low-spin bis pyridine iron II complex that was studied as part of a program of ways to achieve control of axial ligand orientation in iron porphyrin derivatives Safo et al.

Unlike the case of [Fe TFPPBr 8 py 2 ] where the strongly saddled core led to a near perpendicular orientation of the two axial pyridine ligand planes Grinstaff et al.

The small size of the central hole is the result, at least in part, of the core conformation in [Fe TPPBr 4 py 2 ]. Support Center Support Center. Robert Scheidt and Bruce C.

necifer It has been previously noted that coplanar axial ligands are typically seen in iron II porphyrin systems Safo et al. Examination of crystal packing Fig.

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The molecular structure of the title compound is shown in Fig. The pyridine ligands xcdc twisted Author manuscript; available in PMC Sep 5. The axial Fe—N py bond distances of 2. All H atoms were refined using a riding model with C—H distances equal to 0.

The bispyridine ligated iron complex was prepared by stirring the perchlorate derivative with pyridine under argon for 1 h.

Footnotes Supplementary data for this paper are available from the IUCr electronic archives Reference: H atoms and solvent omitted for clarity. Two effects are possible with this porphyrin ligand: J Am Chem Soc. National Center for Biotechnology InformationU. Enciifer data for this paper are available from the IUCr electronic archives Reference: See other articles in PMC that cite the published article. Please review our privacy policy. Unique part of molecule drawn with solid bonds.