[Fe(µ<sub>2</sub>-OH)<sub>6</sub>]<sup>3−</sup> Linked Fe<sub>3</sub>O Triads: Mössbauer Evidence for Trigonal µ<sub>3</sub>-O<sup>2−</sup> or µ<sub>3</sub>-OH<sup>−</sup> Groups in Bridged versus Unbridged Complexes
oleh: D. Nirosha T. De Silva, Tyson N. Dais, Geoffrey B. Jameson, Casey G. Davies, Guy N. L. Jameson, Paul G. Plieger
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-07-01 |
Deskripsi
The syntheses, coordination chemistry, and Mössbauer spectroscopy of hepta-iron(III) complexes using derivatised salicylaldoxime ligands from two categories; namely, ‘single-headed’ (H<sub>2</sub><b>L</b>) and ‘double-headed’ (H<sub>4</sub><b>L</b>) salicylaldoximes are described. All compounds presented here share a [Fe<sub>3</sub>-µ<sub>3</sub>-O] core in which the iron(III) ions are µ<sub>3</sub>-hydroxo-bridged in the complex <b>C1</b> and µ<sub>3</sub>-oxo-bridged in <b>C2</b> and <b>C3</b>. Each compound consists of 2 × [Fe<sub>3</sub>-µ<sub>3</sub>-O] triads that are linked via a central [Fe(µ<sub>2</sub>-OH)<sub>6</sub>]<sup>3−</sup> ion. In addition to the charge balance and microanalytical evidence, Mössbauer measurements support the fact that the triads in <b>C1</b> are µ<sub>3</sub>-OH bridged and are µ<sub>3</sub>-O bridged in <b>C2</b> and <b>C3</b>.