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The existence of cage\u2010like methylaluminomethylene moieties was initially suggested by the reaction of rare\u2010earth\u2010metallocene complex [Cp*<jats:sub>2<\/jats:sub>Lu{(<jats:italic>\u03bc<\/jats:italic>\u2010Me)<jats:sub>2<\/jats:sub>AlMe<jats:sub>2<\/jats:sub>}] with excess AlMe<jats:sub>3<\/jats:sub> affording the deca\u2010aluminium cluster [Cp*<jats:sub>4<\/jats:sub>Lu<jats:sub>2<\/jats:sub>(<jats:italic>\u03bc<\/jats:italic><jats:sub>3<\/jats:sub>\u2010CH<jats:sub>2<\/jats:sub>)<jats:sub>12<\/jats:sub>Al<jats:sub>10<\/jats:sub>(CH<jats:sub>3<\/jats:sub>)<jats:sub>8<\/jats:sub>] in low yield (Cp*=C<jats:sub>5<\/jats:sub>Me<jats:sub>5<\/jats:sub>). Treatment of [Ga<jats:sub>8<\/jats:sub>(CH<jats:sub>2<\/jats:sub>)<jats:sub>12<\/jats:sub>] with excess AlMe<jats:sub>3<\/jats:sub> reproducibly gave the crystalline dodeca\u2010aluminium complex [(CH<jats:sub>3<\/jats:sub>)<jats:sub>12<\/jats:sub>Al<jats:sub>12<\/jats:sub>(<jats:italic>\u03bc<\/jats:italic><jats:sub>3<\/jats:sub>\u2010CH<jats:sub>2<\/jats:sub>)<jats:sub>12<\/jats:sub>] (MAM\u201012). Revisiting a previous approach to \u201cpoly(aluminium\u2010methyl\u2010methylene\u201d by using a (C<jats:sub>5<\/jats:sub>H<jats:sub>5<\/jats:sub>)<jats:sub>2<\/jats:sub>TiCl<jats:sub>2<\/jats:sub>\/AlMe<jats:sub>3<\/jats:sub> (1\u2009:\u2009100) mixture led to amorphous solids displaying solubility behavior and spectroscopic features similar to those of crystalline MAM\u201012. The gallium methylene\u2010derived MAM\u201012 was used as an efficient methylene transfer reagent for ketones.<\/jats:p>","DOI":"10.1002\/chem.202200823","type":"journal-article","created":{"date-parts":[[2022,5,31]],"date-time":"2022-05-31T08:11:03Z","timestamp":1653984663000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["[(CH<sub>3<\/sub>)Al(CH<sub>2<\/sub>)]<sub>12<\/sub>: Methylaluminomethylene (MAM\u201012)"],"prefix":"10.1002","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2581-003X","authenticated-orcid":false,"given":"Georgios","family":"Spiridopoulos","sequence":"first","affiliation":[{"name":"Institut f\u00fcr Anorganische Chemie Eberhard Karls Universit\u00e4t T\u00fcbingen  Auf der Morgenstelle 18 72076 T\u00fcbingen Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Markus","family":"Kramer","sequence":"additional","affiliation":[{"name":"Institut f\u00fcr 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