A Synthetic High-Spin Oxoiron(IV) Complex: Generation, Spectroscopic Characterization, and Reactivity


  • This work was supported by grants from the NIH (GM-33162 to L.Q. and EB-001475 to E.M.) and the NSF (CHE070073 to E.L.B. through TeraGrid resources provided by the NCSA). X-ray crystallographic data collection and structure elucidation were performed by Dr. Victor G. Young, Jr. at the X-Ray Crystallographic Laboratory, Department of Chemistry, University of Minnesota. XAS data were collected on beamline X3B at the National Synchrotron Radiation Light Source and beamline 7-3 at the Stanford Synchrotron Lightsource, both of which are supported by the U.S. DOE and NIH.


High versus low: The high-yield generation of a synthetic high-spin oxoiron(IV) complex, [FeIV(O)(TMG3tren)]2+ (see picture, TMG3tren = 1,1,1-tris{2-[N2-(1,1,3,3-tetramethylguanidino)]ethyl}amine), has been achieved by using the very bulky tetradentate TMG3tren ligand, in order to both sterically protect the oxoiron(IV) moiety and enforce a trigonal bipyramidal geometry at the iron center, for which an S=2 ground state is favored.

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