Biphenylene Ring Expansion by a (H3C)2Si Link from Silicone Grease As Proven by the Crystal Structures of [(Sodium+[2.2.1]cryptand)(9,9-dimethylsilafluorene•-)] as Well as [Sodium+(triglyme)2(biphenylene•-)] and by Total-Reflection X-ray Fluorescence Spectrometry (TXRF)1

Sodium metal mirror reduction of biphenylene in aprotic THF solution containing [2.2.1]cryptand yields as a structurally characterized product the 9,9-dimethylsilafluorene radical anion salt containing a (H3C)2Si expanded cyclobutadiene ring. In addition, the Si content can be detected by total refl...

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Published in:Organometallics 1999-06, Vol.18 (12), p.2387-2389
Main Authors: Bock, Hans, Sievert, Mark, Bogdan, Camelia L, Kolbesen, Bernd O, Wittershagen, Axel
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Language:eng ; jpn
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container_title Organometallics
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creator Bock, Hans
Sievert, Mark
Bogdan, Camelia L
Kolbesen, Bernd O
Wittershagen, Axel
description Sodium metal mirror reduction of biphenylene in aprotic THF solution containing [2.2.1]cryptand yields as a structurally characterized product the 9,9-dimethylsilafluorene radical anion salt containing a (H3C)2Si expanded cyclobutadiene ring. In addition, the Si content can be detected by total reflection X-ray (TXRF) analysis. When the use of any silicon grease was avoided for all glass fittings, the solvent-separated biphenylene radical anion contact pair crystallized from an aprotic diglyme solution.
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title Biphenylene Ring Expansion by a (H3C)2Si Link from Silicone Grease As Proven by the Crystal Structures of [(Sodium+[2.2.1]cryptand)(9,9-dimethylsilafluorene•-)] as Well as [Sodium+(triglyme)2(biphenylene•-)] and by Total-Reflection X-ray Fluorescence Spectrometry (TXRF)1
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