The Crystal and Molecular Structure of 1-Allyl-5-benzoyl-4-phenylpyrimidine-2-one hemihydrate

The crystal structure of C₂₀H₁₆N₂O₂. 0.5 H₂O has been determined from three dimensional X-ray diffraction data. The crystals are monoclinic, space group C 2/c, with a = 24.491(3) Å, b =10.241(2) Å, c = 16.643(2) Å, β =126.63(1)°, V = 3350.0(9) ų, D_calc = 1.290 g. cm^?3, Z = 8. The structure was solved by direct methods and refined by least-squares methods to a final R = 0.0625 for 1358 observed unique reflections (F² ? 2σ(F²)].