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One-electron oxidation of the corresponding Fe(V) nitrido precursor furnishes Fe(VI) nitrides bearing distinct equatorial ligands, including fluoride, chloride, triflate, and acetonitrile. Single-crystal X-ray diffraction analyses reveal distorted octahedral iron centers supported by the tripodal tris-MIC ligand, while zero-field 57Fe Mo\u0308ssbauer spectroscopy and multinuclear NMR spectroscopy establish diamagnetic d2, S = 0 electronic ground states. The Fe(VI) nitrides display remarkable persistence under ambient conditions and during prolonged room-temperature Mo\u0308ssbauer measurements. Electrochemical studies show that the Fe(VI\/V) reduction potentials are strongly modulated by the equatorial ligand, while the cathodically shifted Fe(V\/IV) couples highlight the enhanced \u03c3-donor character of the tris-MIC scaffold compared to its tris-NHC analog. The relative lability of the equatorial ligands enables controlled interconversion among the Fe(VI) nitrides and, most notably, the reversible formation of a unique aqua-coordinated Fe(VI) nitrido complex, [(TAMNMes)FeVI(N)(OH2)](OTf)3. These results establish TAMNMes as a MIC-based complement to the tris-NHC-based TIMMNMes ligand platform, providing a powerful framework for stabilizing and tuning molecular iron complexes in exceptionally high oxidation states.<\/jats:p>","DOI":"10.1021\/jacs.6c12978","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T03:01:49Z","timestamp":1791255709000},"page":"44549-44557","source":"Crossref","is-referenced-by-count":0,"title":["Air- and Thermally\nStable Organometallic Fe(VI) Nitrides\nEnabled by a Tripodal Mesoionic Carbene Ligand: Access to a Water-Coordinated\nFe(VI) Nitrido Complex"],"prefix":"10.1021","volume":"148","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0976-1845","authenticated-orcid":true,"given":"Zihan","family":"Zhang","sequence":"first","affiliation":[{"name":"Friedrich-Alexander-Universita\u0308t Erlangen-Nu\u0308rnberg (FAU) , , Egerlandstra\u00dfe 1 , ,","place":["Erlangen, Germany, 91058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9375-894X","authenticated-orcid":true,"given":"Nadir","family":"Jori","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-Universita\u0308t Erlangen-Nu\u0308rnberg (FAU) , , Egerlandstra\u00dfe 1 , ,","place":["Erlangen, Germany, 91058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2858-9406","authenticated-orcid":true,"given":"Andreas","family":"Scheurer","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-Universita\u0308t Erlangen-Nu\u0308rnberg (FAU) , , Egerlandstra\u00dfe 1 , ,","place":["Erlangen, Germany, 91058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9007-8404","authenticated-orcid":true,"given":"Frank W.","family":"Heinemann","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-Universita\u0308t Erlangen-Nu\u0308rnberg (FAU) , , Egerlandstra\u00dfe 1 , ,","place":["Erlangen, Germany, 91058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7844-2998","authenticated-orcid":true,"given":"Karsten","family":"Meyer","sequence":"additional","affiliation":[{"name":"Friedrich-Alexander-Universita\u0308t Erlangen-Nu\u0308rnberg (FAU) , , Egerlandstra\u00dfe 1 , ,","place":["Erlangen, Germany, 91058"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,10,5]]},"reference":[{"key":"2026102111091818600_cit1","doi-asserted-by":"publisher","first-page":"13","DOI":"10.1021\/acscentsci.8b00698","article-title":"Heme and Nonheme High-Valent\nIron and Manganese Oxo Cores in Biological and Abiological Oxidation\nReactions","volume":"5","author":"Guo","year":"2019","journal-title":"ACS Cent. 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