1,3,5-triphenyl-1,5-pentanedione, C23H20O2, has been prepared and characterized by spectroscopic methods and single crystal X-ray analysis. Crystals are monoclinic, space groupP21/n, a=28.124(4),b=5.997(1),c=10.434(1)Å, β-98.42(1)Å,Z=4. The structure has been refined to a finalR-value of 0.040 for 1625 reflections withFo>3σ(Fo). The compound contains the two carbonyl groups in a mutuallycisarrangem
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