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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