Entropy-Driven Ligand Exchange in a Rotationally Flexible Dinuclear Fe(II)–Fe(II) Complex
Pablo G. Porta, Benjamin Kintzel, Birgit Weber, Michael Busch, Dieter Sorsche · 2026
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Description
Pablo G. Porta and co-authors describe a flexible two-iron complex in 2026 that trades ligands through an entropy-driven balance. Enzymes tune metal spacing precisely, and this synthetic ligand bends around a central carbon bond, letting its two iron centers adapt their distance instead of locking into one geometry.
Cooling a methanol solution flipped the complex from green to blue as methanol swapped in for chloride ligands, a change reversed on warming. Crystal structures captured the key forms, and computer modeling pinned the switch on entropy change with temperature. Electrical tests showed one fully reversible redox step, echoing known iron catalysts and hinting the system could support catalytic work under the right conditions.
Catalog record
| CREATOR | Pablo G. Porta, Benjamin Kintzel, Birgit Weber, Michael Busch, Dieter Sorsche |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 46226 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |