Crystal structure of bis-(4-meth-oxy-pyridine-κN)(meso-5,10,15,20-tetra-phenyl-porphyrinato-κ4 N,N',N'',N''')iron(III) perchlorate.

Morten K Peters,Rainer Herges,Christian Näther

doi:10.1107/s2056989019006194

Morten K Peters, Rainer Herges + Show 1 more

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https://doi.org/10.1107/s2056989019006194

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Abstract

In the crystal structure of the title compound, [Fe(C44H28N4)(C6H7NO)2]ClO4, the FeIII ions are coordinated in an octa-hedral fashion by four N atoms of the porphyrin moiety and two N atoms of two 4-meth-oxy-pyridine ligands into discrete complexes that are located on inversion centers. Charge-balance is achieved by perchlorate anions that are disordered around twofold rotation axes. In the crystal structure, the discrete cationic complexes and the perchlorate anions are arranged into layers with weak C-H⋯O inter-actions between the cations and the anions. The porphyrin moieties of neighboring layers show a herringbone-like arrangement.

Highlights

In the crystal structure of the title compound, [Fe(C44H28N4)(C6H7NO)2]ClO4, the FeIII ions are coordinated in an octahedral fashion by four N atoms of the porphyrin moiety and two N atoms of two 4-methoxypyridine ligands into discrete complexes that are located on inversion centers
These crystals were identified by single crystal X-ray diffraction, which confirmed that crystals of the title compound were obtained
The crystal structure of the title compound consists of discrete complexes which lie on inversion centers

Summary

Chemical context

Porphyrins are of great interest for a number of different applications in medicine and nature (Peters & Herges, 2018; Peters et al, 2018; Shankar et al, 2018; Dommaschk et al, 2015). In our ongoing investigations on SCO compounds based on iron porphyrins, we became interested in the complex bis(4-methoxypyridine-N)(meso-5,10,15,20tetraphenylporphyrinato-4N,N0,N00,N000iron(III) perchlorate, which was synthesized and characterized by high-resolution mass spectroscopy (Shankar et al, 2018). In the course of subsequent investigations, we we able to obtain crystals by the layering technique starting from the FeIII tetraphenylporphyrin perchlorate complexes and using 4-methoxypyridine dissolved in dichloromethane as the lower and n-heptane as the upper layer. These crystals were identified by single crystal X-ray diffraction, which confirmed that crystals of the title compound were obtained

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