Octasilyl[4]radialene Dianion Dilithium with an 8C/10.PI.-Electron System: Synthesis and Characterization, and Evidence for a Lithium Walk on the .PI.-Skeleton.
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Accession number;99A0308720
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| Title;Octasilyl[4]radialene Dianion Dilithium with an 8C/10.PI.-Electron System: Synthesis and Characterization, and Evidence for a Lithium Walk on the .PI.-Skeleton. |
| Author;
MATSUO T
(Univ. Tsukuba, Ibaraki)
SEKIGUCHI A
(Univ. Tsukuba, Ibaraki)
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Journal Title;Abstr Symp Organomet Chem Jpn
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Journal Code:L0853A
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ISSN:
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VOL.45th;NO.;PAGE.54-55(1998)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;English |
| Abstract;Octasilyl[4]radialene (1) was reduced by lithium metal in tetrahydrofuran(THF) to yield red crystals of the dianion dilithium (2) with a novel eight-center, ten-electron .PI. systems. The molecular structure of 2 is determined by X-ray crystallography. The two Li+ ions of 2 are not fixed to the .PI.-electron system in toluene, but are fluxional, giving rise to a highly symmetric bis-contact ion pair. In a solvating medium such as THF, one of the Li+ ions dissociates in such a way that 2 exists as a contact ion pair and a solvent-separated ion pair. The evidence for the Li+ ion walk on the .PI.-skeleton is also demonstrated. (author abst.) |
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