Bis(imidazolium)-1,3-diphosphete-diide: A Building Block for FeC 2 P 2 Complexes and Clusters

Reaction of the 6π-electron aromatic four-membered heterocycle (IPr) C P (1) (IPr=1,3-bis(2,6-diisopropylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene) with [Fe CO ] gives the neutral iron tricarbonyl complex [Fe(CO) -η -{(IPr) C P }] (2). Oxidation with two equivalents of the ferrocenium salt, [Fe(Cp)...

Full description

Saved in:
Bibliographic Details
Published in:Angewandte Chemie International Edition 2022-10, Vol.61 (43), p.e202205371
Main Authors: Scharnhölz, Moritz Theodor, Coburger, Peter, Gravogl, Lisa, Klose, Daniel, Gamboa-Carballo, Juan José, Le Corre, Grégoire, Bösken, Jonas, Schweinzer, Clara, Thöny, Debora, Li, Zhongshu, Meyer, Karsten, Grützmacher, Hansjörg
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Reaction of the 6π-electron aromatic four-membered heterocycle (IPr) C P (1) (IPr=1,3-bis(2,6-diisopropylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene) with [Fe CO ] gives the neutral iron tricarbonyl complex [Fe(CO) -η -{(IPr) C P }] (2). Oxidation with two equivalents of the ferrocenium salt, [Fe(Cp) ](BArF ), affords the dicationic tricarbonyl complex [Fe(CO) -η -{(IPr) C P }](BArF ) (4). The one-electron oxidation proceeds under concomitant loss of one CO ligand to give the paramagnetic dicarbonyl radical cation complex [Fe(CO) -η -{(IPr) C P }](BArF ) (5). Reduction of 5 allows the preparation of the neutral dicarbonyl complex [Fe(CO) -η -{(IPr) C P }] (6). An analysis by various spectroscopic techniques ( Fe Mössbauer, EPR) combined with DFT calculations gives insight into differences of the electronic structure within the members of this unique series of iron carbonyl complexes, which can be either described as electron precise or Wade-Mingos clusters.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202205371