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- Title
A Triad of Highly Reduced, Linear Iron Nitrosyl Complexes: {FeNO}<sup>8-10</sup>.
- Authors
Chalkley, Matthew J.; Peters, Jonas C.
- 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.
- Subjects
IRON compound synthesis; OXIDATION-reduction reaction; NITROSYL compounds; BORANE derivatives; COMPLEX compounds
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 39, p12174
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201605403