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This cationic Sn(II) complex exhibits pronounced ambiphilic reactivity, participating in electrophilic, nucleophilic, and \u03c3\u2010bond activation reactions. All derived compounds were characterized by nuclear magnetic resonance spectroscopy, single crystal x\u2010ray diffraction analysis, and high\u2010resolution mass spectrometry. Density functional theory calculations reveal the coexistence of a lone pair of electrons and a vacant 5\n                    <jats:italic>p<\/jats:italic>\n                    \u2010orbital at the tin center, which rationalizes the experimentally observed dual reactivity. Remarkably, the transition metal\u2010like electronic structure enables this organotin(II) species to act as an efficient catalyst for transfer hydrogenation of azoarenes and imines using NH\n                    <jats:sub>3<\/jats:sub>\n                    BH\n                    <jats:sub>3<\/jats:sub>\n                    as hydrogen source. Combined experimental and computational mechanistic studies reveal a distinct catalytic platform based on Sn(II)\/Sn(IV) redox cycle at a single tin(II) center. This work demonstrates the first Sn(II)\/Sn(IV) catalyzed reduction of unsaturated bonds, offering a paradigm for mimicking transition metal reactivity through rationally designed main group systems in mediating diverse chemical transformations.\n                  <\/jats:p>","DOI":"10.1002\/anie.7786614","type":"journal-article","created":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T16:58:25Z","timestamp":1772989105000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["T\u2010Shaped Stannyliumylidene Ion: Synthesis, Reactivity, and Redox Catalysis"],"prefix":"10.1002","volume":"65","author":[{"given":"Zexin","family":"Qi","sequence":"first","affiliation":[{"name":"Key Laboratory of Green Chemistry and Technology Ministry of Education College of Chemistry Sichuan University  Chengdu P.R. 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