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Cleavage of cluster iron-sulfide bonds in cyclophane-coordinated Fe_nS_m complexes.

ABSTRACT: Reaction of the tri(μ-sulfido)triiron(iii) tris(β-diketiminate) cyclophane complex, Fe₃S₃L^Et/Me (1), or of the di(μ-sulfido)diiron(iii) complex Fe₂S₂HL^Et/Me (5), with the related tri(bromide)triiron(ii) complex Fe₃Br₃L^Et/Me (2) results in electron and ligand redistribution to yield the mixed-ligand multiiron complexes, including Fe₃Br₂SL^Et/Me (3) and Fe₂Br₂SHL^Et/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.

SUBMITTER: Buratto WR

PROVIDER: S-EPMC7880558 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Cleavage of cluster iron-sulfide bonds in cyclophane-coordinated FenSm complexes.

Buratto William R WR Ferreira Ricardo B RB Catalano Vincent J VJ García-Serres Ricardo R Murray Leslie J LJ

Dalton transactions (Cambridge, England : 2003) 20210104 3

Reaction of the tri(μ-sulfido)triiron(iii) tris(β-diketiminate) cyclophane complex, Fe3S3LEt/Me (1), or of the di(μ-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 Fe2B ...[more]

PMID: 33393563

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