Isolation of a uranium(III) benzophenone ketyl radical that displays redox-active ligand behaviour

Ellen M Matson; John J Kiernicki; Nickolas H Anderson; Phillip E Fanwick; Suzanne C Bart

doi:10.1039/c4dt01636j

Isolation of a uranium(III) benzophenone ketyl radical that displays redox-active ligand behaviour

Dalton Trans. 2014 Dec 28;43(48):17885-8. doi: 10.1039/c4dt01636j. Epub 2014 Jul 24.

Authors

Ellen M Matson¹, John J Kiernicki, Nickolas H Anderson, Phillip E Fanwick, Suzanne C Bart

Affiliation

¹ H.C. Brown Laboratory, Department of Chemistry, Purdue University, West Lafayette, IN 47906, USA. [email protected].

PMID: 25058749
DOI: 10.1039/c4dt01636j

Abstract

The first uranium(III) charge separated ketyl radical complex, Tp*2U(OC·Ph2), has been isolated and characterized by infrared, (1)H NMR, and electronic absorption spectroscopies, along with X-ray crystallography. Tp*2U(OC·Ph2) is a potent two-electron reductant towards N3Mes (Mes = 2,4,6-trimethylphenyl) and (2,2,6,6-tetramethyl-piperidin-1-yl)oxyl (TEMPO), with reducing equivalents derived from the metal centre and the redox-active benzophenone.