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Die aus 100  ml n-Butyllithium  in Hexan (164  mMol),  19.1  g TMEDA  (164
mMo1) und 10.8  g Biphenyl(70  mMo1) erhahenen KristaIle von I wurden in
100  ml abs. Ether gel&t  und bei -20!aC unter Riihren langsam portionsweise

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