Crystal data for 1-4-epoxy-4-[(4-nitrophenyl)methyl]-1-phenyl-1H-2,3-benzodioxepin-5(4H)-one (C₂₂H₁₅NO₆) and 1,4-epoxy-4-[(4-bromophenyl)methyl]-1-phenyl-1H-2,3-benzodioxepin-5(4H)-one (C₂₂H₁₅BrO₄)

The indexed X-ray diffraction powder data of 1,4-epoxy-4-[(4-nitrophenyl)methyl]-1-phenyl-1H-2,3-benzodioxepin-5(4H)-one (OZONO, C₂₂H₁₅NO₆) and 1,4-epoxy-4-[(4-bromophenyl)methyl]-1-phenyl-1H-2,3-benzodioxepin-5(4H)-one (OZOBR, C₂₂H₁₅BrO₄) are reported. OZONO and OZOBR crystallize in the monoclinic space groups P2₁/c and P2₁/a, respectively. The cell constants are a = 8.200 (4), b = 14.574 (6), c = 15.908 (7) Å, β = 100.30 (3)°, V = 1870.5 ų, D_m = 1.36 (1), D_x = 1.38 Mg m⁻³ for OZONO and a = 12.217 (5), b = 8.945 (2), c = 17.062 (5) Å, β = 96.85 (2)°, V = 1851.2 ų, D_m = 1.49 (1), D_x = 1.52 Mg m⁻³ for OZOBR. The quantitative figures of merit (F_N) are F₂₀ = 62(0.007, 48) and F₂₆ = 28(0.016, 58) deg⁻¹, respectively. The JCPDS Diffraction File No. for OZONO is 36-1988 and for OZOBR 36-1989.