X-ray powder diffraction data for N-4-(aminocarbonyl)phenyl-4-2-1-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)aminocarbonyl-2-oxopropyldiazenyl-benzamide, a p-form of pigment yellow 181

摘要

X-ray powder diffraction data, unit-cell parameters and space group for the β-form of pigment yellow 181, C_(25)H_(21)N_7O_5, are reported a = 22.556(6) A, 6 = 4.9684(9) A, c = 21.318(6) A, β=109.492(4)°, unit-cell volume V=2252,1 A~3, Z=4, space group P2_1/c. All measured lines were indexed and are consistent with the P2_1/c space group. No detectable impurities were observed.