Iron Coordination and Halogen-Bonding Assisted Iodosylbenzene Activation

Christina Wegeberg, David Poulsen de Sousa, Christine McKenzie

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskning

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Abstrakt

The iron complex of the hexadentate ligand N,N,N'-tris(2-pyridylmethyl)ethylendiamine-N'-acetate (tpena) efficiently catalyzes selective oxidations of electron-rich olefins and sulfides by insoluble iodosylbenzene (PhIO). Surprisingly, these reactions are faster and more selective than homogenous catalytic mixtures using soluble terminal oxygen transfer agents. Isolation of a reactive iron-terminal oxidant adduct, an unique Fe(III)-OIPh complex, is facilitated by strong stabilizing supramolecular halogen-bonding. L3-edge XANES suggests +1.6 for the average oxidation state for the iodine atom3 in the iron(III)-coordinated PhIO. This represents a reduction of iodine relative to the original “hypervalent” (+3) PhIO. The equivalent of electron density must be removed from the {(tpena)Fe(III)O} moiety, however Mössbauer spectroscopy shows that the iron atom is not high valent.
OriginalsprogEngelsk
Publikationsdato2016
Antal sider1
StatusUdgivet - 2016
Begivenhed42nd International Conference of Coordination Chemistry - Brest, Frankrig
Varighed: 3. jul. 20168. jul. 2016
Konferencens nummer: 42
https://iccc2016.sciencesconf.org/

Konference

Konference42nd International Conference of Coordination Chemistry
Nummer42
LandFrankrig
ByBrest
Periode03/07/201608/07/2016
Internetadresse

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