Abstract: The crystal and melecular structure of P-ferrocenylacetophenone has been determined bythe single crystal X-ray diffractometry. The crystal is orthorhombic and space group P_bcawith the cell constants a = 7.7342, b = 10.5485, c = 34.0332Å and Z = 8. The analytic resultsshow that both the CP rings are almost parallel. The plane of each ring is tilt 18 from thatof Phenyl ring.The carbon atom of the acetyl group is normal sp² hybridization, the anglesaround this carbon is close to 120. One significant result obtained in this structure is that thecarbon to carbon bond length in the CP ring linkedto the phenyl group is longer than C-C length in the other CP ring.

Key words: P-ferrocenylacetophenone, crystal structure