Kristallisation und Strukturbestimmung von 2,5-Bis(trimethylsilyl)-/?-benzochinon und von 2,5-Bis(trimethylsilyl)hydrochinon-natrium-bis(dimethoxyethan), einem Polymer-Strang mit Chelat-überkappten Wasserstoffbrücken (e O»HO)Na®(DME)2 Interactions in Crystals, 62 [1, 2] Crystallization and Structure Determination of 2,5-Bis(trimethylsilyl)-/?-benzoquinone and of 2,5-Bis(trimethylsilyl)hydroquinone Sodium Bis(dimethoxyethane), a Polymer String with Chelate-Capped Hydrogen
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چکیده
From the electron and proton transfer equilibria network of quinones in solution a novel intermediate can be prepared by deprotonation of 2,5-bis(trimethylsilyl)hydroquinone to its monoanion using sodium metal. The sodium salt crystallizes in polymer strings connected via 0 e (H )0 hydrogen bridges, which are capped additionally by twofold dimethoxy-ethanesolvated Na® countercations. The single crystal structure determination reveals one of the shortest O® ••• HO distances observed so far of only 246 pm. M NDO calculations further confirm the assignment of hydroquinone monoanion building blocks in the polymer chain. For structural comparison as well as for attempts of its sodium reduction, 2,5-bis(trimethylsilyl)-/?-benzoquinone has been synthesized. Its single crystal structure is reported, which does not show any cyanine distortion.
منابع مشابه
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