The molecular and crystal structure of the title compound was determined by the single-crystal X-ray analysis. The crystal is orthorhombic with a space group Pbca, a=15.161 (9), b=25.805 (5), c=9.948 (1) Å, and Z=8. The 4-nitrophenyl ring is nearly on a same plane with the imidazole ring, while the other two benzene rings make angles of 26.5° and 47.7°.
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Inouye et al. (1986) studied this question.
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