Crystals of the 1 : 1 complex of benzidine and 7,7,8,, containing dichloromethane in the crystal lattice, are monoclinic, space group 12/m, with a=20.892, b=9"950, c= 6.445 *, fl= 91.92 °, Z= 2. The structure was refined by three-dimensional analysis using the blockdiagonal and full-matrix least-squares method. Benzidine and TCNQ molecules are alternately stacked along the c axis to form columns, with the molecular planes almost parallel to each other. Between the columns there are channels running along the c axis, in which dichloromethane molecules are sited.
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