Abstract

1,2,3,5-Tetrakis(trifluoromethyl)benzene reacts with phenyl-lithium or t-butyl-lithium togive mixtures of de-aromatised products, derivatives of 2,5- and 2,4-cyclohexadiene-l-ylideneof molecular composition C 10H 2F 10Ph 2, C 10H 2F 9Ph 3, C 10H 2F 10Bu 2 t and C 10H 3F 10Bu t.The X-ray crystal structure of the triphenyl derivative has been obtained. The 1H, 19Fand 13C NMR data provide a satisfactory proof for the structures of the other compounds.

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