Journal
DALTON TRANSACTIONS
Volume 50, Issue 3, Pages 816-821Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt03805a
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Funding
- National Institutes of Health [R01-GM123241, S10 OD02175801A1]
- Labex ARCANE [ANR-11-LABX-0003-01]
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In this study, reactions between triiron complexes and sulfido or bromide complexes led to redistribution of ligands and electrons, resulting in the formation of mixed-ligand multiiron complexes. The cleavage and redistribution observed in these complexes resemble the necessary Fe-S bond cleavage for substrate activation in nitrogenase enzymes, offering a new perspective on the lability of Fe-S bonds in FeS clusters.
Reaction of the tri(mu-sulfido)triiron(iii) tris(beta-diketiminate) cyclophane complex, Fe3S3LEt/Me (1), or of the di(mu-sulfido)diiron(iii) complex Fe2S2HLEt/Me (5), with the related tri(bromide)triiron(ii) complex Fe3Br3LEt/Me (2) results in electron and ligand redistribution to yield the mixed-ligand multiiron complexes, including Fe3Br2SLEt/Me (3) and Fe2Br2SHLEt/Me (4). The cleavage and redistribution observed in these complexes is reminiscent of necessary Fe-S bond cleavage for substrate activation in nitrogenase enzymes, and provides a new perspective on the lability of Fe-S bonds in FeS clusters.
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