[Cu3(mu-S)2]3+ clusters supported by N-donor ligands: progress toward a synthetic model of the catalytic site of nitrous oxide reductase. J Am Chem Soc 2005 Oct 12;127(40):13752-3
Date
10/06/2005Pubmed ID
16201771DOI
10.1021/ja053971tScopus ID
2-s2.0-26444568144 (requires institutional sign-in at Scopus site) 82 CitationsAbstract
By treating Cu(I) complexes of neutral, bidentate N-donor ligands with S8, clusters with novel delocalized mixed-valence [Cu3(mu-S)2]3+ cores have been isolated. X-ray crystal structures and UV-vis and resonance Raman spectral features of these clusters reveal similarities to the tetracopper-sulfide "CuZ" site in nitrous oxide reductase. A delocalized S = 1 ground state for the mixed-valent CuIIICu2II cores is supported by the observation of high symmetry in the X-ray structures and 10-line hyperfine features arising from coupling to three equivalent Cu ions in EPR spectra obtained at room temperature (shown) and 10 K. The delocalization we observe contrasts with the localization reported previously for a [Cu3(mu-O)2]3+ analogue (Root, D. E.; Henson, M. J.; Machonkin, T.; Mukherjee, P.; Stack, T. D. P.; Solomon, E. I. J. Am. Chem. Soc. 1998, 120, 4982), which we rationalized through DFT calculations.
Author List
Brown EC, York JT, Antholine WE, Ruiz E, Alvarez S, Tolman WBMESH terms used to index this publication - Major topics in bold
CatalysisCopper
Crystallography, X-Ray
Ligands
Models, Biological
Models, Molecular
Molecular Structure
Organometallic Compounds
Oxidoreductases
