Structural and Physical Characterization of (Nitrato)iron(III) Porphyrinates [Fe(por)(NO(3))] - Variable Coordination of Nitrate

Graeme R A Wyllie; Orde Q Munro; Charles E Schulz; W Robert Scheidt

doi:10.1016/j.poly.2007.03.048

Structural and Physical Characterization of (Nitrato)iron(III) Porphyrinates [Fe(por)(NO(3))] - Variable Coordination of Nitrate

Polyhedron. 2007 Oct 10;26(16):4664-4672. doi: 10.1016/j.poly.2007.03.048.

Authors

Graeme R A Wyllie¹, Orde Q Munro, Charles E Schulz, W Robert Scheidt

Affiliation

¹ Contribution from The Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, and Department of Physics, Knox College, Galesburg, Illinois, 61401.

Abstract

We report the X-ray crystal structures of two different iron(III) porphyrinates: [Fe(OEP)(NO(3))] and [Fe(TPP)(NO(3))]. The first complex has the nitrate ion coordinated by a single oxygen atom while the second derivative has the nitrate coordinated in a symmetric bidentate fashion. This latter structure is a redetermination that shows some differences from an earlier structure; the difference appears to be the result of an unrecognized nitrate ion disorder in the earlier structure determination. Changes in physical properties of three species ([Fe(TPivP)(NO(3))], [Fe(OEP)(NO(3))], and [Fe(TPP)(NO(3))] as a function of coordination mode were examined by Mössbauer and EPR spectroscopies; EPR spectra appear to be most sensitive to the change in coordination mode.

Abstract

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