Structural Motifs of [Fe(CO2)n]- Clusters (n = 3-7)
Michael C Thompson1, Leah G Dodson1, J Mathias Weber1
1JILA and Department of Chemistry and Biochemistry and ‡JILA and NIST, University of Colorado , 440 UCB, Boulder, Colorado 80309-0440, United States.
Abstract:
We present IR spectra and quantum chemical calculations for anionic iron-CO2 clusters of the form [Fe(CO2)n]- (n = 3-7). All observed clusters have at least two CO2 units strongly bound to the metal atom. These strongly bound iron-CO2 complexes form the core ions of the clusters and are solvated by additional, weakly bound CO2 molecules. Larger clusters show clear infrared signatures of core ion isomers with three CO2 moieties as well. Dominant structural motifs are based on bidentate CO2 ligands with Fe-O/Fe-C bonds, oxalate ligands, and metal insertion into a CO bond.
More Related Videos
Related Concept Videos
Coordination Number and Geometry
Valence Bond Theory
Exceptions to the Octet Rule
Coordination Compounds and Nomenclature
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...


