Acta Cryst. (2009). E65, o1223  [ doi:10.1107/S1600536809014858 ]

4,4'-(Anthracene-9,10-diyl)dibenzoic acid dimethylformamide disolvate

H. Li, Z.-Q. Wang, L.-Z. Yang, Y.-Q. Liu and D.-B. Mao

Abstract: In the title compound, C₂₈H₁₈O₄·2C₃H₇NO, the dihedral angle between the benzene rings and the anthracene system is 74.05 (12)°. A crystallographic inversion centre is located in the middle of the anthracene unit. The dimethylformamide solvent molecules are partially disordered over two positions of approximately equal occupancy [0.529 (6):0.471 (6)]. Intermolecular O-HO hydrogen bonds with the major occupancy formamide O atom as acceptor result in the formation of 2:1 solvate-complex aggregates, which are alternately linked to shorter solvate units via weak intermolecular C-HO contacts generated from the rotational disorder of the formamide O atom (minor occupancy component). Weak C-H interactions between the solvent molecules as the donor and the outer anthracene rings support these contacts in the crystal structure for both disorder components.

Online 7 May 2009

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