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Complex <jats:bold>1<\/jats:bold> in dichloromethane:acetonitrile (1\u2009:\u20094, v\/v) solution at \u221240\u2009\u00b0C reacts with hydrogen peroxide (H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>) to result in the corresponding nitrite (NO<jats:sub>2<\/jats:sub><jats:sup>\u2212<\/jats:sup>) complex, [Co<jats:sup>III<\/jats:sup>(TTMPP<jats:sup>2\u2212<\/jats:sup>)(NO<jats:sub>2<\/jats:sub><jats:sup>\u2212<\/jats:sup>)], <jats:bold>2<\/jats:bold>. The formation of a Co(III)\u2010peroxynitrite intermediate is presumed in this reaction based on the characteristic phenol ring nitration test. From spectroscopic studies, formation of [Co<jats:sup>IV<\/jats:sup>=O] species followed by a Co(III)\u2010porphyrin radical complex was observed during the course of the reaction.<\/jats:p>","DOI":"10.1002\/asia.202401082","type":"journal-article","created":{"date-parts":[[2024,11,24]],"date-time":"2024-11-24T23:08:53Z","timestamp":1732489733000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Reaction of a Nitrosyl Complex of Co(II)\u2010Porphyrin with Hydrogen Peroxide: Formation of a Porphyrin Radical Cation"],"prefix":"10.1002","volume":"20","author":[{"given":"Bapan","family":"Samanta","sequence":"first","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Guwahati  Guwahati, Assam 781039 India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shankhadeep","family":"Saha","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Guwahati  Guwahati, Assam 781039 India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Riya","family":"Ghosh","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Guwahati  Guwahati, Assam 781039 India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sayani","family":"Maity","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Guwahati  Guwahati, Assam 781039 India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0594-6749","authenticated-orcid":false,"given":"Biplab","family":"Mondal","sequence":"additional","affiliation":[{"name":"Department of Chemistry Indian Institute of Technology Guwahati  Guwahati, Assam 781039 India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,12,24]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM199604253341707"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0016-5085(92)91454-C"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.cb.11.110195.002221"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1038\/ni1001-907"},{"key":"e_1_2_8_5_1","unstructured":"Nitric Oxide: Biology and Pathobiology(Ed: L.\u2005J. 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