Dinitrogen chemistry at five-coordinate iron centers

INOR 35

Neal P. Mankad, nealm@caltech.edu, Matthew T. Whited, whited@caltech.edu, and Jonas C Peters, jpeters@caltech.edu. Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd. MC 127-72, 1200 E. California Blvd., Pasadena, CA 91125
Dinitrogen complexes of iron(I) are unusual and quite interesting in the context of a Chatt-type Fe(I)/Fe(IV) nitrogen fixation mechanism. Previous Fe(I)-N2 complexes with 3- or 4-coordinate Fe centers have been dinuclear with bridging dinitrogen ligands. We will present the synthesis of new monoanionic tetradentate ligands with [SiP3] donor sets and discuss their use in preparing 5-coordinate iron complexes, including the first terminal dinitrogen complexes of iron(I). The release of dinitrogen reduction products from these Fe(I)-N2 species under protolytic conditions, as well as synthetic efforts to access Fe-N multiple bonds in these new trigonal bipyramidal environments, will also be discussed.
 

Synthetic Coordination Chemistry
8:30 AM-12:30 PM, Sunday, August 19, 2007 BCEC -- 213, Oral

Division of Inorganic Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007