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Chem. Chem. Phys."],"abstract":"<jats:p>\n                    The ground-state rotational spectrum of the elusive open-shell radical cation HCN\n                    <jats:sup>+<\/jats:sup>\n                    has been measured for the first time using a vibrational-rotational double-resonance approach based on leak-out spectroscopy.\n                  <\/jats:p>","DOI":"10.1039\/d5cp04204f","type":"journal-article","created":{"date-parts":[[2025,12,3]],"date-time":"2025-12-03T13:41:19Z","timestamp":1764769279000},"page":"4405-4411","update-policy":"https:\/\/doi.org\/10.1039\/rsc_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["High-resolution spectroscopy of [H,C,N]\n                    <sup>+<\/sup>\n                    : II. 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