Insertion Reactions of NH<sub>3</sub> and H<sub>2</sub>O with the Ferriogermylenes ArGeFeCp(CO)<sub>2</sub> (Ar = Ar<sup>Me6</sup> (−C<sub>6</sub>H<sub>3</sub>‑(C<sub>6</sub>H<sub>2</sub>‑2,4,6-Me<sub>3</sub>)<sub>2</sub>) or Ar<sup>iPr4</sup> (−C<sub>6</sub>H<sub>3</sub>‑(C<sub>6</sub>H<sub>3</sub>‑2,6‑<sup>i</sup>Pr<sub>2</sub>)<sub>2</sub>); Cp = η<sup>5</sup>‑C<sub>5</sub>H<sub>5</sub>): Structural Isomerism and Polymorphism in a Metallogermylene
journal contribution
posted on 2021-10-12, 19:49 authored by Alice
C. Phung, James C. Fettinger, Philip P. PowerThe
ferriogermylenes ArGeFeCp(CO)<sub>2</sub> (Ar = −C<sub>6</sub>H<sub>3</sub>-(C<sub>6</sub>H<sub>2</sub>-2,4,6-Me<sub>3</sub>)<sub>2</sub> (Ar<sup>Me6</sup> (<b>1a</b>)), Ar = −C<sub>6</sub>H<sub>3</sub>-(C<sub>6</sub>H<sub>3</sub>-2,6-<sup>i</sup>Pr<sub>2</sub>)<sub>2</sub> (Ar<sup>iPr4</sup> (<b>1b</b>)))
(Cp = η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>) react with an
excess of NH<sub>3</sub>(<i>l</i>) to form the insertion
products ArGe(NH<sub>2</sub>)(H)FeCp(CO)<sub>2</sub> (Ar = Ar<sup>Me6</sup> (<b>2a</b>) or Ar<sup>iPr4</sup> (<b>2b</b>)). Similarly, ferriogermylene <b>1a</b> reacts with water
to form the insertion product Ar<sup>Me6</sup>Ge(OH)(H)FeCp(CO)<sub>2</sub> (<b>3</b>). Unusually, crystals of <b>1a</b> exist
as three different polymorphs whose structures differ primarily in
their C<sub>ipso</sub>–Ge–Fe bond angles. Complexes <b>1</b>–<b>3</b> were characterized by NMR, UV–vis,
IR spectroscopy, and X-ray crystallography.
