Four two-component molecular crystals 1 2 , 1 3 , 1 4 and 1 5 composed of chloronitrobenzoic acids and p -anisidine as components have been prepared. Among these molecular crystals, 1 2 and 1 3 showed the generation of chirality (space group P 2 1 ) by aggregation of mutually parallel column structures with their 2 1 axes pointing in the same direction, and the others showed no chirality. This paper shows that the generation of chirality in a molecular crystal can be explained on the basis of the aggregation of column structures and that weaker intermolecular interactions affect the generation of chiral molecular crystal.
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