|Name||Ms. ChristiAnna Brantley|
|Organization or Institution||University Of Florida|
The use of pseudo-carboxylates in homometallic cobalt cluster chemistry
ChristiAnna L. Brantley, Khalil A. Abboud, and George Christou*
Department of Chemistry, University of Florida, Gainesville, FL 32611-7200.
The development of cobalt-oxo cluster chemistry has been explored over many years and has led to an array of clusters of various nuclearities with relevance to bioinorganic chemistry, magnetism, and catalysis. Typical ligation environments for cobalt-containing clusters are bridging carboxylate groups and nitrogen-containing ligands such as pyridine or 2,2′-bipyridine. Although metal-oxo-carboxylate chemistry has afforded numerous clusters for many transition and lanthanide metals, the utilization of ‘pseudo-carboxylates’ in such chemistry has been under-explored. Recently, di-alkyl(aryl)phosphinates have emerged as attractive pseudo-carboxylate groups to investigate in cluster chemistry because they mimic carboxylate ligand binding modes but are more bulky. We have therefore begun to investigate the use of diphenylphosphinic acid (Ph2PO2H) in CoII and/or CoIII cluster chemistry in the search for new clusters with interesting structural features and physical properties. The synthesis, structure, and magnetic properties of a new cobalt diphenylphosphinate cluster will be presented.