Synthesis and Structure of a Free Germacyclopentadienide Ion: [Li([12]crown‐4)2][C4Me4GeSi(SiMe3)3]

William P. Freeman; T Don Tilley; Frederick P. Arnold; Arnold L. Rheingold; P. Gantzel

doi:10.1002/anie.199518871

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Synthesis and Structure of a Free Germacyclopentadienide Ion: [Li([12]crown‐4)2][C4Me4GeSi(SiMe3)3]

Article 1995 en

Abstract

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A highly non-aromatic structure is exhibited by the free germacyclopentadienide ion (shown on the right) in the Li([12]crown-4)2 salt. The angle between the C4Ge plane and the GeSi bond is 100.1°. Calculations at the RHF level of theory on (C4H4GeSiH3)− accurately reproduce the observed geometrical parameters, and predict that the analogous Si and Sn derivatives would also have highly pyramidalized structures.

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