INOR 180 |
| Treatment of FeI2 or FeCl3 with lithium di(tert-butyl)amide affords dark orange crystals of the two-coordiante iron(II) complex Fe[N(t-Bu)2]2. The X-ray crystal reveals a linear geometry (N-Fe-N = 179.5°); the Fe-N distance is 1.879(2) Å and the dihedral angle between the two NC2 planes is 80.5°. Fe[N(t-Bu)2]2 is a rare example of a linear two-coordinate open-shell transition metal complex. The linear N-Fe-N bond angle and the absence of any long range Fe···C contacts make this compound unusual among two-coordinate iron compounds. Applied field Mössbauer spectroscopy has revealed an unusually large internal hyperfined field, Hint ~105 T. Variable temperature magnetic susceptibility studies show that the compound has an unusually large magnetic moment, indicative of unquenched orbital angular momentum arriving from an orbitally degenerate ground state.
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Coordination Chemistry: Synthesis
7:00 PM-10:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster
Sci-Mix
Division of Inorganic Chemistry |
