Synthesis and Characterization of Symmetrically versus Unsymmetrically Proton-Bridged Hexa-Iron Clusters

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dc.citation.issue25
dc.citation.volume6
dc.contributor.authorDe Silva DNT
dc.contributor.authorDais TN
dc.contributor.authorJameson GB
dc.contributor.authorCutler DJ
dc.contributor.authorBrechin EK
dc.contributor.authorDavies CG
dc.contributor.authorJameson GNL
dc.contributor.authorPlieger PG
dc.coverage.spatialUnited States
dc.date.accessioned2023-11-02T19:44:50Z
dc.date.accessioned2023-11-03T04:55:20Z
dc.date.available2021-06-15
dc.date.available2023-11-02T19:44:50Z
dc.date.available2023-11-03T04:55:20Z
dc.date.issued2021-06-29
dc.description.abstractSyntheses and magnetic and structural characterization of hexa-iron complexes of derivatized salicylaldoximes are discussed. Complexation of Fe(BF4)2·6H2O with each ligand (H2 L1 and H4 L2) in a methanolic-pyridine solution resulted in hexa-iron compounds (C1 and C2, respectively), which each contain two near-parallel metal triangles of [Fe3-μ3-O], linked by six fluoride bridges and stabilized by a hydrogen-bonded proton between the μ3-O groups. Within each metal triangle of C2, Fe(III) ions are connected via the amine "straps" of (H4 L2-2H). Variable-temperature magnetic susceptibility and Mössbauer data of C1 and C2 indicate the presence of dominant antiferromagnetic interactions between the high-spin (S = 5/2) Fe(III) centers. For C1, two quadrupole doublets are observed at room temperature and 5 K, consistent with structural data from which discrete but disordered [Fe3-μ3-O] and [Fe3-μ3-OH] species were inferred. For C2, a single sharp quadrupole doublet with splitting intermediate between those determined for C1 was observed, consistent with the symmetric [Fe3-μ3-O···H···μ3-O-Fe3] species inferred crystallographically from the very short μ3-O···μ3-O separation. The differences in the physical properties of the complexes, as seen in the Mössbauer, X-ray, and magnetic data, are attributed to the conformational flexibility imparted by the nature of the linkages between the closely related ligands.
dc.description.confidentialfalse
dc.format.pagination16661-16669
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/34235338
dc.identifier.citationDe Silva DNT, Dais TN, Jameson GB, Cutler DJ, Brechin EK, Davies CG, Jameson GNL, Plieger PG. (2021). Synthesis and Characterization of Symmetrically versus Unsymmetrically Proton-Bridged Hexa-Iron Clusters.. ACS Omega. 6. 25. (pp. 16661-16669).
dc.identifier.doi10.1021/acsomega.1c02255
dc.identifier.eissn2470-1343
dc.identifier.elements-typejournal-article
dc.identifier.issn2470-1343
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69025
dc.languageeng
dc.publisherAmerican Chemical Society
dc.publisher.urihttps://pubs.acs.org/doi/10.1021/acsomega.1c02255
dc.relation.isPartOfACS Omega
dc.rights(c) The author/s CC BY-NC-NDen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.titleSynthesis and Characterization of Symmetrically versus Unsymmetrically Proton-Bridged Hexa-Iron Clusters
dc.typeJournal article
pubs.elements-id447267
pubs.organisational-groupOther
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