title: Structural Conversions of Synthetic and Protein-Bound Iron-Sulfur Clusters.
abstract: Synthetic iron-sulfur clusters of general formulation [FemSqLl]zwith core atoms Fe and S and terminal ligands L constitute a family of molecular clusters with remarkably diverse geometrical and electronic structures. Several structure types are also found in proteins. The large majority of research on these clusters has involved elucidation of physical properties. Here, we direct attention to reactivity in the form of cluster conversions in which the FemSqcores of reactants are transformed to new structures, usually of different nuclearity, in overall reactions such as self-assembly and fragment condensation and dissociation. An extensive body of core conversions, many of which have not been recognized as such, are presented including those in biological systems. All structural core types are depicted, and all core conversions are diagrammatically summarized. Clusters containing the cubane-type Fe4S4core play a central role in conversion chemistry. The core conversion concept tends to reinforce the description of iron-sulfur cores as modular units subject to various covalent bond interactions that lead to different structures.
authors.affiliation: Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States.
authors.forename: R H
authors.initials: RH
authors.lastname: Holm
authors.affiliation: Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States.
authors.forename: Wayne
authors.initials: W
authors.lastname: Lo
mesh_terms: D058085:Iron Compounds / Q000737:chemistry*; D007506:Iron-Sulfur Proteins / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry; D013457:Sulfur Compounds / Q000737:chemistry*
chemical_list: D058085:Iron Compounds; D007506:Iron-Sulfur Proteins; D009589:Nitrogen Oxides; D013457:Sulfur Compounds