title: Five-coordinate M(II)-semiquinonate (M = Fe, Mn, Co) complexes: reactivity models of the catechol dioxygenases.
abstract: A series of five-coordinate M(II)-semiquinonate (M = Fe, Mn, Co) complexes were synthesized and characterized, including the first example of a mononuclear Fe(II)-semiquinonate. Intermediates were observed in the reactions of M(II)-phenSQ (M = Fe, Co) with O2. Evidence for the relevance of these intermediates to the intradiol catechol dioxygenases was obtained by characterization of the oxidized semiquinone-derived product, muconic anhydride, resulting from the reaction of [PhTt(tBu)]Co(II)(3,5-DBSQ) with O2.
authors.affiliation: Department of Chemistry & Biochemistry, University of Delaware, Newark, DE 19716, USA. riordan@udel.edu.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Glenn P A
authors.initials: GP
authors.lastname: Yap
authors.forename: Charles G
authors.initials: CG
authors.lastname: Riordan
mesh_terms: D002396:Catechols / Q000737:chemistry*; D049308:Dioxygenases / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D008956:Models, Chemical; D011809:Quinones / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D002396:Catechols; D008670:Metals; D011809:Quinones; D049308:Dioxygenases; C034221:catechol