{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T04:55:04Z","timestamp":1767848104449,"version":"3.49.0"},"reference-count":34,"publisher":"Wiley","issue":"23","license":[{"start":{"date-parts":[[2004,10,14]],"date-time":"2004-10-14T00:00:00Z","timestamp":1097712000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2004,12,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>New fascinating electronic features of the simple diketoamine chelate ligand HN[CH<jats:sub>2<\/jats:sub>C(<jats:italic>t<\/jats:italic>Bu)\uf8feO]<jats:sub>2<\/jats:sub> (<jats:bold>1<\/jats:bold>) are described. Unexpectedly, the corresponding trianionic amido\u2010dienolate form of <jats:bold>1<\/jats:bold> is capable of reducing main\u2010group metal atoms M after initial coordination and intramolecular L\u2192M two\u2010electron transfer and of stabilizing main\u2010group elements in unusual low oxidation states. This is impressively shown by the synthesis and structural characterization of the novel Ge and Sn complexes <jats:bold>4\u20136<\/jats:bold> by redox reactions of lithiated <jats:bold>1<\/jats:bold> with the corresponding metal halides GeCl<jats:sub>4<\/jats:sub> and MCl<jats:sub>2<\/jats:sub> (M=Ge, Sn). Surprisingly, conversion of tris\u2010lithiated <jats:bold>1<\/jats:bold> with GeCl<jats:sub>4<\/jats:sub> readily consumes two molar equivalents of GeCl<jats:sub>4<\/jats:sub> and results in the formation of the neutral GeCl<jats:sub>3<\/jats:sub> complex <jats:bold>4<\/jats:bold> and GeCl<jats:sub>2<\/jats:sub>. The former represents the second example of a structurally characterized neutral octahedrally coordinated germanium compound. Reaction of dilithiated <jats:bold>1<\/jats:bold> with GeCl<jats:sub>2<\/jats:sub> does not lead to the expected ClGe(+2) complex but affords the novel dimeric germylene <jats:bold>5<\/jats:bold>, whereas similar reaction using SnCl<jats:sub>2<\/jats:sub> furnishes the monomeric stannylene (ClSn(+2) complex) <jats:bold>2<\/jats:bold> and elemental tin due to the higher oxidation potential of Sn(+2). Unexpectedly, a similar redox reaction of dilithiated <jats:bold>1<\/jats:bold> with PbCl<jats:sub>2<\/jats:sub> furnishes the first air\u2010 and water\u2010stable lithium 1,2\u2010diketoimine\u2013enolate <jats:bold>7<\/jats:bold> and elemental lead. Compound <jats:bold>7<\/jats:bold> is tetrameric in the solid state and consists of a strongly distorted Li<jats:sub>4<\/jats:sub>O<jats:sub>4<\/jats:sub> cubic core with trigonal\u2010bipyramidal coordinated Li<jats:sup>+<\/jats:sup> ions.<\/jats:p>","DOI":"10.1002\/chem.200400807","type":"journal-article","created":{"date-parts":[[2004,10,14]],"date-time":"2004-10-14T11:03:19Z","timestamp":1097751799000},"page":"5971-5976","source":"Crossref","is-referenced-by-count":27,"title":["Novel Hypervalent Complexes of Main\u2010Group Metals by Intramolecular Ligand\u2192Metal Electron Transfer*"],"prefix":"10.1002","volume":"10","author":[{"given":"Matthias","family":"Driess","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicoleta","family":"Dona","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Klaus","family":"Merz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2004,11,18]]},"reference":[{"key":"e_1_2_5_1_2","unstructured":"\u00a0"},{"key":"e_1_2_5_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/0020-1650(70)80324-5"},{"key":"e_1_2_5_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic50153a025"},{"key":"e_1_2_5_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/0010-8545(92)80010-O"},{"key":"e_1_2_5_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00083a026"},{"key":"e_1_2_5_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic990003g"},{"key":"e_1_2_5_7_2","doi-asserted-by":"publisher","DOI":"10.1246\/cl.1990.1721"},{"key":"e_1_2_5_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1099-0682(199906)1999:6<1021::AID-EJIC1021>3.0.CO;2-I"},{"key":"e_1_2_5_9_2","doi-asserted-by":"crossref","first-page":"178","DOI":"10.1039\/B311385J","author":"Min K. 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