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A Triad of Highly Reduced, Linear Iron Nitrosyl Complexes: {FeNO}(8-10).


ABSTRACT: Given the importance of Fe-NO complexes in both human biology and the global nitrogen cycle, there has been interest in understanding their diverse electronic structures. Herein a redox series of isolable iron nitrosyl complexes stabilized by a tris(phosphine)borane (TPB) ligand is described. These structurally characterized iron nitrosyl complexes reside in the following highly reduced Enemark-Feltham numbers: {FeNO}(8) , {FeNO}(9) , and {FeNO}(10) . These {FeNO}(8-10) compounds are each low-spin, and feature linear yet strongly activated nitric oxide ligands. Use of Mössbauer, EPR, NMR, UV/Vis, and IR?spectroscopy, in conjunction with DFT?calculations, provides insight into the electronic structures of this uncommon redox series of iron nitrosyl complexes. In particular, the data collectively suggest that {TPBFeNO}(8-10) are all remarkably covalent. This covalency is likely responsible for the stability of this system across three highly reduced redox states that correlate with unusually high Enemark-Feltham numbers.

SUBMITTER: Chalkley MJ 

PROVIDER: S-EPMC5079689 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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A Triad of Highly Reduced, Linear Iron Nitrosyl Complexes: {FeNO}(8-10).

Chalkley Matthew J MJ   Peters Jonas C JC  

Angewandte Chemie (International ed. in English) 20160825 39


Given the importance of Fe-NO complexes in both human biology and the global nitrogen cycle, there has been interest in understanding their diverse electronic structures. Herein a redox series of isolable iron nitrosyl complexes stabilized by a tris(phosphine)borane (TPB) ligand is described. These structurally characterized iron nitrosyl complexes reside in the following highly reduced Enemark-Feltham numbers: {FeNO}(8) , {FeNO}(9) , and {FeNO}(10) . These {FeNO}(8-10) compounds are each low-sp  ...[more]

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