Interbenzylic 19F,19F spin-spin coupling constants in bis(fluoromethyl) arenes |
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Authors: | Ludger Ernst Sabine Pulmann |
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Abstract: | Five- to eleven-bond F,F spin coupling is observed in bis(fluoromethyl)arenes. According to INDO MO calculations, these couplings are transmitted mainly via the aromatic π-system. The low preference of 1,4-(CH2F)2-benzene for the conformation in which the C? F bonds are perpendicular to the aromatic ring is shown by the strong increase of7J(FF) upon double ortho-substitution. |
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