Covalency Trends in Actinides

Seminar series
Inorganic Chemistry
Wed, Oct 16 4:30pm
Cram Conference Room, 3440 Mol Sci
Speaker Dr. Stosh A. Kozimor
Los Alamos National Laboratory
Chemistry Division - Inorganic Isotope and Actinide Chemistry Group

Covalency is a fundamental concept in chemistry used to describe chemical bonding in s-, p-, d-, and f-block elements. However, given the restrictions of existing experimental techniques, the degree of covalency of a given bond is difficult to measure and is often estimated or inferred. This situation was recently altered by the pioneering work of Solomon, Hedman, and Hodgson who used ligand K-edge X-ray Absorption Spectroscopy (XAS) to directly measure covalency in bonding. We are currently expanding this technique to complexes that contain heavy atoms in an effort to improve contemporary descriptions of covalency, electronic structure, and bonding in actinides. These studies are providing unique insight to evaluate the relative roles of d- and f-orbitals in bonding, and these results will be presented in the context of recent advances in f-element chemical reactivity that cannot be easily explained using a traditional description of f-element electronic structure.