Synthesis,
Characterization, and Alkyne Trimerization
Catalysis of a Heteroleptic Two-Coordinate Fe<sup>I</sup> Complex
Michael
I. Lipschutz
Teera Chantarojsiri
Yuyang Dong
T. Don Tilley
10.1021/jacs.5b02504.s005
https://acs.figshare.com/articles/dataset/Synthesis_Characterization_and_Alkyne_Trimerization_Catalysis_of_a_Heteroleptic_Two_Coordinate_Fe_sup_I_sup_Complex/2165326
The
synthesis of the first heteroleptic, two-coordinate Fe<sup>I</sup> complex IPr–Fe–N(SiMe<sub>3</sub>)DIPP (<b>1</b>) (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene;
DIPP = 2,6-<sup><i>i</i></sup>Pr<sub>2</sub>–C<sub>6</sub>H<sub>3</sub>) is reported. Protonation of the Fe<sup>II</sup> bis(amido) complex Fe[N(SiMe<sub>3</sub>)DIPP]<sub>2</sub> followed
by addition of IPr and reduction by potassium graphite in a one-pot
reaction results in good yields of <b>1</b>. The redox activity
of <b>1</b> and comparison between <b>1</b> and its reduction
product by <sup>57</sup>Fe Mössbauer spectroscopy are discussed,
and the reduction was found to be metal-based rather than ligand-based.
The activity of <b>1</b> toward the catalytic cyclotrimerization
of terminal and internal alkynes is described.
2015-05-20 00:00:00
Alkyne Trimerization Catalysis
redox activity
potassium graphite
FeI
Fe
DIPP
bi
reduction product
IPr