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Research on alkyl and aryl cyanates, ROCN, the inorganic and organic fulminates, XCNO, and the CHNO and CRNO isomers lead to detailed chemical and spectroscopic (IR, UV, ESR, MS, MW, and PES) investigations of reactive intermediates generated by flash vacuum pyrolysis, matrix isolation, and matrix photolysis, in particular nitrenes and carbenes from azides, diazo compounds, triazoles, tetrazoles, and sydnones, as well as nitrile imines, ylides, and oxides, imidoylnitrenes, carbodiimides, cyanocyclopentadiene, fulvenallene, numerous ketenes, propadienones, iminopropadienones, sulfur compounds like S\uf8feC\uf8feC\uf8feS, N\n                    <jats:sub>2<\/jats:sub>\n                    S, and RCNS, the HCN dimers CH\n                    <jats:sub>2<\/jats:sub>\n                    \uf8feNCN and HN\uf8feCHCN, and numerous other compounds. Along the way, equipment for flash vacuum pyrolysis in conjunction with IR, UV, and ESR spectroscopies and mass spectrometry was developed.\n                  <\/jats:p>","DOI":"10.1002\/tcr.202500197","type":"journal-article","created":{"date-parts":[[2025,12,13]],"date-time":"2025-12-13T02:41:38Z","timestamp":1765593698000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Reactive Intermediates and Unusual Molecules: 70 Years with Fascinating Chemistry"],"prefix":"10.1002","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0874-7144","authenticated-orcid":false,"given":"Curt","family":"Wentrup","sequence":"first","affiliation":[{"name":"School of Chemistry and Molecular Biosciences The University of Queensland  Brisbane QLD 4072 Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,12,12]]},"reference":[{"key":"e_1_2_18_2_1","first-page":"273","article-title":"Formation of the Explosive Chloride of Nitrogen by Electrolysis","volume":"11","author":"Hale W. 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