A Dinuclear Iron Complex with Two Cofacial [FeS4] Cores Linked by Covalent Ligand Periphery Clamps and Dissociable Thiolate Bridges
✍ Scribed by Dieter Sellmann; Kai P. Peters; Raquel Montón Molina; Frank W. Heinemann
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 124 KB
- Volume
- 2003
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Abstract
As part of a long‐term study of dinuclear iron complexes with sulfur‐rich coordination spheres and cofacial, sterically variable binding sites for molecules relevant to nitrogenase, the complex (AsPh~4~)~2~ [{Fe(‘apS~4~’)}~2~] (5) was synthesized and completely characterized [‘apS~4~’^4−^ = 1,3‐bis(2,3‐dimercaptobenzamido)propane(4−)]. Complex 5 contains two cofacial [Fe^III^(S~2~C~6~H~4~R)~2~]^−^ units linked by [Fe−S−Fe] thiolate bridges and two peripheral propanediamide ligand backbones that are located on opposite sides of the molecular anion and prevent the complete separation of the two [FeS~4~] cores of 5 if the Fe−S−Fe bridges dissociate. No marked differences were found in the molecular parameters, spectroscopic, magnetic and electrochemical properties of the [Fe~2~S~8~] cores in the anion of 5 and the parent complex [{Fe(S~2~C~6~H~4~)~2~}~2~]^2−^. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)