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X-Ray Structure of a Heterochiral, Sulfoximine-Stabilized Dilithiomethane Derivative
1Institut für Anorganische Chemie der Universität, Spitalstrasse 51, CH-4056 Basel (Switzerland).
Angewandte Chemie (International Ed. in English)
|December 22, 1999
Abstract:
A distorted Li(6)O octahedron in the center and four geminal dilithiated sulfoximine units characterize a tetrameric aggregate of the chiral sulfoximine-stabilized dilithiomethane derivative 3, a previously unknown reaction intermediate in asymmetric dianion chemistry. A comparison with the crystal structure of the monolithiated parent 2, formed by the treatment of 1 with nBuLi, allows a rationalization of the second lithiation.