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Crossing organolithium compounds with organolithium compounds : molecular squares and a cage-encapsulating reaction

Fyfe, Andrew A. and Kennedy, Alan R. and Klett, Jan and Mulvey, Robert E. (2011) Crossing organolithium compounds with organolithium compounds : molecular squares and a cage-encapsulating reaction. Angewandte Chemie, 50 (34). pp. 7776-7780. ISSN 0044-8249

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Abstract

Triple-crossed: An extraordinary crossing reaction involving three popular utility organolithium reagents nBuLi, LiTMP (TMP=2,2,6,6-tetramethylpiperidide), and LiC5H5 leads to the unexpected deprotonation of C5H5− anions to C5H42− dianions, which was manifested through the trapping of the hexameric nBuLi cage by a [{Li(μ-TMP)Li(μ-C5H5)}4] molecular square ring (see picture).