Fluorene-1-carboxylic Acid

In fluorene-1-carboxylic acid, C₁₄H₁₀O₂, the sole hydrogen bond is of the cyclic dimer type about a center of symmetry. The carboxyl H atom is ordered. Distances in the fluorene core are very similar to those in fluorene itself; the fluorene core dihedral angle is, however, larger than in fluorene.

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