| Autor: |
DeRosha DE; Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06511 , United States., Arnet NA; Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06511 , United States., Mercado BQ; Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06511 , United States., Holland PL; Department of Chemistry , Yale University , 225 Prospect Street , New Haven , Connecticut 06511 , United States. |
| Abstrakt: |
Small, coordinatively unsaturated iron-sulfur clusters are conceived as building blocks for the diverse set of shapes of iron-sulfur clusters in biological and synthetic chemistry. Here we describe a synthetic method for preparing [2Fe-1S] clusters containing two iron(II) ions, which are supported by a relatively unhindered β-diketiminate supporting ligand. The [2Fe-1S] cluster can be isolated in the presence of trimethylphosphine, and the compound with one PMe 3 on each iron(II) ion has been crystallographically characterized. The PMe 3 ligands may be removed with B(C 6 F 5 ) 3 to give a spectroscopically characterized species with solvent ligands. This species is a versatile synthon for [2Fe-2S], [4Fe-3S], and [10Fe-8S] clusters. Crystallographic characterization of the 10Fe cluster shows that it has all iron(II) ions, and the core has two [4Fe-4S] cubes that share a face in a novel arrangement. This cluster also has two iron sites that are coordinated to solvent donors, suggesting the potential for using this type of cluster for reactivity in the future. |
