Abstract
A new orthorhombic polymorph of the title compound, C30H24N4, with a density of 1.315 Mg m−3, has been obtained. The molecule is centrosymmetric with the centroid of the cyclohexa-1,4-diene ring located on an inversion center. The two unique benzene rings are almost perpendicular to each other [dihedral angle = 86.70 (6)°] and are oriented at dihedral angles of 30.79 (5) and 68.07 (5)° with respect to the central cyclohexadiene ring. In the crystal, π–π stacking is observed between the central cyclohexa-1,4-diene-1,4-diamine unit and a phenyl ring of a neighboring molecule [centroid–centroid distance = 3.7043 (7) Å]. The crystal structure of the triclinic polymorph [Ohno et al. (2014 ▶). Acta Cryst. E70, o303–o304] showed chains running along the b-axis direction through weak C—H⋯π interactions.
Highlights
A new orthorhombic polymorph of the title compound, C30H24N4, with a density of 1.315 Mg m 3, has been obtained
The molecule is centrosymmetric with the centroid of the cyclohexa-1,4-diene ring located on an inversion center
The two unique benzene rings are almost perpendicular to each other [dihedral angle = 86.70 (6) ] and are oriented at dihedral angles of 30.79 (5) and 68.07 (5) with respect to the central cyclohexadiene ring
Summary
University, Shimo-Okubo 255, Sakura-ku, Saitama 338-8570, Japan, and bComComprehensive Analysis Center for Science, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama 338-8570, Japan
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