Mono- and dinuclear non-heme iron–nitrosyl complexes: Models for key intermediates in bacterial nitric oxide reductases

Journal Article · Tue Jan 01 04:00:00 EST 2013 · Coordination Chemistry Reviews

DOI:https://doi.org/10.1016/j.ccr.2012.05.007· OSTI ID:1324805

Berto, Timothy C.; Speelman, Amy L.; Zheng, Sheng; Lehnert, Nicolai

High-spin non-heme iron–nitrosyls are of direct interest to both the chemical and biological communities as these species exhibit interesting chemical properties and act as direct models for enzymatic intermediates. The electronic ground state of the ferrous NO complexes, {Fe–NO}⁷, is best described as high-spin Fe^III antiferromagnetically coupled to NO^-, generating the spectroscopically observed S = 3/2 ground state. These species have been identified as catalytically relevant to a variety of NO-reducing enzymes such as bacterial nitric oxide reductase (NorBC) and flavo(rubredoxin) nitric oxide reductase (FNOR). Recently, the corresponding one-electron reduced {Fe–NO}⁸ (nitroxyl) complexes have also been implicated as biologically significant species. In this review the available spectroscopic data for {Fe–NO}⁷ and {Fe–NO}⁸ mono- and dinuclear non-heme iron–nitrosyls are summarized, and the implications of these results with respect to the electronic structures and reactivities of these species, in particular towards NO reduction, are discussed.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: NSF
• OSTI ID: 1324805
• Journal Information: Coordination Chemistry Reviews, Journal Name: Coordination Chemistry Reviews Journal Issue: 1 Vol. 257; ISSN 0010-8545
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY