{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,12]],"date-time":"2026-09-12T06:09:32Z","timestamp":1789193372615,"version":"build-2803163510"},"reference-count":133,"publisher":"Wiley","issue":"34","license":[{"start":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T00:00:00Z","timestamp":1780012800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T00:00:00Z","timestamp":1780012800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["CHE\u20102002885"],"award-info":[{"award-number":["CHE\u20102002885"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2026,9,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Nitric oxide reductases (NORs) are a class of metalloenzymes that are known to mediate the 2 e\n                    <jats:sup>\u2212<\/jats:sup>\n                    \/ 2 H\n                    <jats:sup>+<\/jats:sup>\n                    reduction of nitric oxide (NO) to nitrous oxide (N\n                    <jats:sub>2<\/jats:sub>\n                    O). There are three known types of NOR enzymes, each using a different iron\u2010based active site to mediate NO reduction. Despite the difference in active site architecture across NORs, NO reduction is expected to be linked by a common intermediate: hyponitrite (N\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    <jats:sup>2\u2212<\/jats:sup>\n                    ). However, experimentally, very little is known about the expected Fe\u2010hyponitrite intermediates. In this Perspective, we provide a detailed discussion of Fe\u2010hyponitrite chemistry. We start with an introduction into NOR metalloenzymes and provide a detailed account of the known and proposed steps of catalytic NO reduction by these enzymes with a specific focus on the proposed Fe\u2010hyponitrite intermediates. We then turn our focus on what is known about synthetic Fe\u2010hyponitrite complexes. We introduce hyponitrite as a ligand and discuss sources of preformed hyponitrite. We then introduce the three known Fe\u2010hyponitrite complexes and discuss how these relate to NO reduction in NORs. Finally, we summarize what is known about Fe\u2010hyponitrite chemistry and give an outlook on the aspects of this chemistry that are still vastly underexplored.\n                  <\/jats:p>","DOI":"10.1002\/chem.71156","type":"journal-article","created":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T08:39:57Z","timestamp":1780043997000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The Role of Iron\u2010Hyponitrite Intermediates in Biology and Insights From Synthetic Model Complexes"],"prefix":"10.1002","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1003-4357","authenticated-orcid":false,"given":"Michael O.","family":"Lengel","sequence":"first","affiliation":[{"name":"Department of Chemistry University of Michigan  Ann Arbor Michigan USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5221-5498","authenticated-orcid":false,"given":"Nicolai","family":"Lehnert","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Michigan  Ann Arbor Michigan 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