476445-56-4Relevant academic research and scientific papers
Three-coordinate, 12-electron organometallic complexes of iron(II) supported by a bulky β-diketiminate ligand: Synthesis and insertion of CO to give square-pyramidal complexes
Smith, Jeremy M.,Lachicotte, Rene J.,Holland, Patrick L.
, p. 4808 - 4814 (2008/10/08)
The preparation of a series of three-coordinate, 12-electron organometallic complexes of iron(II) supported by a bulky β-diketiminate ligand is described. The thermally stable complexes LFeR (R = Et, CH2tBu, iPr) are three-coordinate in both the solid state (single crystal X-ray diffraction) and solution. They react rapidly with CO to form the diamagnetic complexes LFe(CO)2(COR), which have an unusual square-pyramidal geometry. Spectroscopic and crystallographic studies show that the acyl group is in the axial position. As a result, there are two orientations of the acyl group about the Fe-C bond, and the isomeric ratio is dependent on the size of R. The two isomers are in equilibrium in solution at room temperature.
