Tetrasilyl-Substituted Cyclobutadiene Dianion Dilithium Salt: Synthesis and Structure.
β Scribed by A. Sekiguchi; T. Matsuo; M. Tanaka; H. Watanabe; M. Nakamoto
- Publisher
- John Wiley and Sons
- Year
- 2004
- Weight
- 7 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0931-7597
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in ethanol 1) +AzH in CH 3 NO 2 2) AcONH 4 (a) (b) 4-Azulen-1-yl substituted 2,6-dimethyl-and 2,6-diphenyl-pyridines are obtained in good yields from the reaction of corresponding 4-azulen-1-yl-pyranylium salts and ammonium acetate in ethanol or starting from 4-chloro-2,6-diphenyl-pyranylium salts
A highly symmetric structure is displayed in toluene by 1, which was obtained by reduction of octasilyl[4]radialene with lithium in THF. The two Li ions of 1 are not fixed to the Ο-electron system in toluene, but are fluxional, giving rise to a bis-contact ion pair. In a solvating medium such as THF