{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,20]],"date-time":"2026-04-20T04:23:04Z","timestamp":1776658984154,"version":"3.51.2"},"reference-count":26,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2025,6,30]],"date-time":"2025-06-30T00:00:00Z","timestamp":1751241600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"JSPS KAKENHI grants","award":["25H01257"],"award-info":[{"award-number":["25H01257"]}]},{"name":"JSPS KAKENHI grants","award":["24K08382"],"award-info":[{"award-number":["24K08382"]}]},{"name":"JSPS KAKENHI grants","award":["23H01943"],"award-info":[{"award-number":["23H01943"]}]},{"name":"JSPS KAKENHI grants","award":["24K08388"],"award-info":[{"award-number":["24K08388"]}]},{"name":"JSPS KAKENHI grants","award":["2025-15"],"award-info":[{"award-number":["2025-15"]}]},{"name":"JSPS KAKENHI grants","award":["JPMJCR19R4"],"award-info":[{"award-number":["JPMJCR19R4"]}]},{"name":"Collaborative Research Program of the Institute for Chemical Research at Kyoto University","award":["25H01257"],"award-info":[{"award-number":["25H01257"]}]},{"name":"Collaborative Research Program of the Institute for Chemical Research at Kyoto University","award":["24K08382"],"award-info":[{"award-number":["24K08382"]}]},{"name":"Collaborative Research Program of the Institute for Chemical Research at Kyoto University","award":["23H01943"],"award-info":[{"award-number":["23H01943"]}]},{"name":"Collaborative Research Program of the Institute for Chemical Research at Kyoto University","award":["24K08388"],"award-info":[{"award-number":["24K08388"]}]},{"name":"Collaborative Research Program of the Institute for Chemical Research at Kyoto University","award":["2025-15"],"award-info":[{"award-number":["2025-15"]}]},{"name":"Collaborative Research Program of the Institute for Chemical Research at Kyoto University","award":["JPMJCR19R4"],"award-info":[{"award-number":["JPMJCR19R4"]}]},{"name":"New Energy and Industrial Technology Development Organization (NEDO)","award":["25H01257"],"award-info":[{"award-number":["25H01257"]}]},{"name":"New Energy and Industrial Technology Development Organization (NEDO)","award":["24K08382"],"award-info":[{"award-number":["24K08382"]}]},{"name":"New Energy and Industrial Technology Development Organization (NEDO)","award":["23H01943"],"award-info":[{"award-number":["23H01943"]}]},{"name":"New Energy and Industrial Technology Development Organization (NEDO)","award":["24K08388"],"award-info":[{"award-number":["24K08388"]}]},{"name":"New Energy and Industrial Technology Development Organization (NEDO)","award":["2025-15"],"award-info":[{"award-number":["2025-15"]}]},{"name":"New Energy and Industrial Technology Development Organization (NEDO)","award":["JPMJCR19R4"],"award-info":[{"award-number":["JPMJCR19R4"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Heavier element analogues of a ketone, a C=O double-bond compound, have been fascinating compounds from the viewpoint of main-group element chemistry because of their unique structural features and reactivity as compared with those of a ketone, which plays an important role in organic chemistry. We will report here the synthesis of diorgano-stannanethione and stannaneselone featuring tin\u2013chalcogen double bonds, which are the heavy-element analogues of a ketone. The newly obtained stannaneselone has been structurally characterized by spectroscopic analyses and single-crystal X-ray diffraction (SC-XRD) analysis, showing the short Sn\u2013Se bond length featuring \u03c0-bond character. The obtained bis(ferrocenyl)stannanechalcogenones were found to undergo [2+4]cycloaddition reactions with 2,3-dimethyl-1,3-butadiene, affording the corresponding six-membered ring compound. Notably, thermolysis of the [2+4]cycloadduct of the stannaneselone regenerated the stannaneselone via the retro[2+4]cycloaddition, whereas the sulfur analogue was thermally very stable.<\/jats:p>","DOI":"10.3390\/molecules30132826","type":"journal-article","created":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T04:04:22Z","timestamp":1751342662000},"page":"2826","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Ferrocenyl Substituted Stannanethione and Stannaneselone"],"prefix":"10.3390","volume":"30","author":[{"given":"Keisuke","family":"Iijima","sequence":"first","affiliation":[{"name":"Graduate School of Science and Technology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8571, Ibaraki, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koh","family":"Sugamata","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Institute of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8571, Ibaraki, Japan"},{"name":"Tsukuba Research Center for Energy Materials Sciences (TREMS), University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8571, Ibaraki, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5410-8488","authenticated-orcid":false,"given":"Takahiro","family":"Sasamori","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Institute of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8571, Ibaraki, Japan"},{"name":"Tsukuba Research Center for Energy Materials Sciences (TREMS), University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8571, Ibaraki, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,6,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2140","DOI":"10.1021\/ja01186a043","article-title":"Repulsive Forces in Relation to Bond Energies, Distances and Other Properties","volume":"70","author":"Pitzer","year":"1948","journal-title":"J. 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