Three-Coordinate, Cyclic Bent Allene Iron Complexes
dataset
posted on 2013-05-13, 00:00 authored by Conor Pranckevicius, Douglas W. StephanNovel
three-coordinate Fe complexes featuring 1,2-diphenyl-3,5-bis(2,6-dimethylphenoxy)pyrazolin-4-ylidine
or “cyclic bent allene” (CBA) have been synthesized.
Reaction with FeCl<sub>2</sub>(PPh<sub>3</sub>)<sub>2</sub> results
in the loss of both phosphines to yield monomeric Fe(CBA)Cl<sub>2</sub>. Treatment with 2 equiv of benzyl Grignard affords the three-coordinate
alkylated product Fe(CBA)(Bn)<sub>2</sub>. Exposure of the alkylated
species to an atmosphere of CO results in reductive elimination of
1,3-diphenylpropanone and formation of trigonal-bipyramidal Fe(CBA)(CO)<sub>4</sub>.
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