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Abstract
Indigo, C16H10O2N2, is monoclinic, space group P21/c with a = 9.24, b = 5.77, c = 12.22 Å, β = 117.0°, Z = 2 (modification I). Based on synchrotron data, the crystal structure was refined for the first time including hydrogen atom positions. According to this investigation, the N – H····O hydrogen bond may be considered to be bifurcated, with the intermolecular bridge being significantly shorter than the intramolecular one.
Published Online: 2010-08-25
Published in Print: 1988
