Acta Cryst. (2009). E65, o1471  [ doi:10.1107/S1600536809020261 ]

2-(4-tert-Butylphenyl)-1H-imidazo[4,5-f][1,10]phenanthroline sesquihydrate

C.-Y. Zheng and T.-Q. Sun

Abstract: In the title compound, C₂₃H₂₀N₄·1.5H₂O, the mean planes of the imidazo[4,5-f][1,10]phenanthroline system and the benzene ring make a dihedral angle of 21.76 (2)°. One water O atom lies on a twofold rotation axis. The organic molecules and water molecules are linked via N-HO, O-HN and O-HO hydrogen bonds. Weak intermolecular C-HN hydrogen bonds and - stacking interactions between inversion-related phenanthroline rings complete the three-dimensional hydrogen-bonding network in the crystal structure. The stacking distance is short at 3.513 (2) Å and the perpendicular distance between the rings is 3.355 Å. The three methyl groups are disordered over two positions, with a site-occupancy ratio of 0.875 (14):0.125 (14).

Online 6 June 2009

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