Acta Crystallographica, Section C: Crystal Structure Communications 1998-12-15

9H-fluorene-2-carboxaldehyde.

A J Dobson, R E Gerkin

Index: Acta Crystallogr. C 54 ( Pt 12) , 1890-2, (1998)

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Abstract

The title compound, C14H10O, crystallized in the centrosymmetric space group P2(1)/c with a single molecule in the asymmetric unit. The C-H...O interaction having the shortest C...O distance involves the ring-bridging C9 atom and one of its H atoms, and results in the formation of a cyclic dimer about a center of symmetry. The molecular core is nearly planar. The dihedral angle between the best-fit plane of the ring to which the aldehyde group is attached and the plane of the aldehyde group is 4.4 (9) degrees. In a number of respects the molecular disposition is similar to that previously determined for the geometrically similar dibenzofuran-4-carboxaldehyde molecule.