A Bidentate Carbene Ligand Stabilizes a Low-Coordinate Iron(0) Carbonyl Complex
- Anne K. Hickey (1523062)
- Wei-Tsung Lee (1331016)
- Chun-Hsing Chen (1497616)
- Maren Pink (1340589)
- Jeremy M. Smith (187646)
DOIAbstract
The bulky bis(carbene)borate ligand Ph<sub>2</sub>B(<sup>t</sup>BuIm)<sub>2</sub><sup>–</sup> stabilizes low-coordinate and low-valent iron complexes. The four-coordinate iron(II) complex Ph<sub>2</sub>B(<sup>t</sup>BuIm)<sub>2</sub>FeCl(THF) is a precursor to the low-spin iron(I) complex Ph<sub>2</sub>B(<sup>t</sup>BuIm)<sub>2</sub>Fe(CO)<sub>3</sub>. Despite a reversible reduction wave in the cyclic voltammogram, access to the iron(0) complex [Ph<sub>2</sub>B(<sup>t</sup>BuIm)<sub>2</sub>Fe(CO)<sub>3</sub>]<sup>−</sup> requires reduction under a CO atmosphere. Without excess CO, KC<sub>8</sub> reduction leads to formation of the dimer K<sub>2</sub>[Ph<sub>2</sub>B(<sup>t</sup>BuIm)<sub>2</sub>Fe(CO)<sub>2</sub>] along with lo...
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