Preparation, spectral studies and X-ray crystal structure of 1,3,5-triphenyl-1,5-pentanedione, C23H20O2

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)A, β-98.42(1)A,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 mutuallycis arrangement.