Caractérisation du dihydro-9,10 anthracène par analyse X sur poudres

New X-ray powder diffraction data for 9,10-dihydroanthracene, C₁₄H₁₂, have been obtained from crystals prepared at 273 K by slow evaporation of acetone solution. Chemical analysis gives a purity better than 99.8% for this compound which crystallizes in the monoclinic space group P2₁. The cell parameters were determined by employing single-crystal diffraction methods (Bragg and precession patterns) and refined from accurate powder diffractometer data recorded at T = 293(1)K with quartz monochromator, Cu Kα radiation, λ = 1.54178 Å, and Si as external standard. The cell constants are a = 7.72 (1), b = 6.25 (1), c = 10.82 (1) Å and β = 108.3(1)°; V = 495 (2) ų, Z = 2, D_m = 1.19 (2) and D_x = 1.21 Mg m⁻³. The JCPDS Diffraction File No. is 37-1987.