Structural and Physical Characterization of (Nitrato)iron(III) Porphyrinates [Fe(por)(NO(3))] - Variable Coordination of Nitrate.
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.
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.
Graeme R A
GR
Wyllie
Orde Q
OQ
Munro
Charles E
CE
Schulz
W Robert
WR
Scheidt