CRYSTAL-STRUCTURE INVESTIGATION OF 2-PHENYLIMIDAZO[F]1,1O-PHENANTHROLINE

The crystal structure of tile title compound (PIP) has been determined by single crystal X-ray diffraction methods. C19H12N4 . C2H5OH crysta llizes in the monoclinic space group P2(1/n) with a=11.4414(8), b=12.6 052(9), c=12.4G27(8)Angstrom, beta=100.345(2)degrees, Z = 4, V = 1768. 17 Angstrom(3), D-cal = 1.286 Mg . m m(-3), mu (MoK alpha) = 0.80 cm(- 1), F(000) = 720. The structure was solved by the direct methods and r efined by full-matrix least-squares method to a final R = 0.0337 and R (w) = 0.0332 for 2306 reflections with F-0 > 4 sigma(F-0). The phenl r ing and the imidazo[f] 1,10-phenanthroline moiety are coplanar in the crystal. The packing of the molecules involves hydrogen bonded associa tion of the hydroxyl group of ethanol both with the N-H of the imidazo le moiety of one PIP and one nitrogen atom of the phenanthroline moiet y of another PIP.