Acta Crystallographica Section C

Crystal Structure Communications

Volume 61, Part 8 (August 2005)

organic compounds

sk1854 scheme

Acta Cryst. (2005). C61, o483-o489 [doi:10.1107/S0108270105020093]

Effect of substitution on the dimensionality of supramolecular aggregation in dihydrobenzopyrazoloquinolines

J. Portilla, J. Quiroga, J. Cobo, J. N. Low and C. Glidewell

Abstract: Molecules of 8-methyl-10-phenyl-6,10-dihydro-5H-benzo[h]pyrazolo[3,4-b]quinoline, C₂₁H₁₇N₃, (I), are linked into cyclic centrosymmetric dimers by means of paired C-HN hydrogen bonds. In each of 8-methyl-7,10-diphenyl-6,10-dihydro-5H-benzo[h]pyrazolo[3,4-b]quinoline, C₂₇H₂₁N₃, (II), and 8-methyl-7-(4-methylphenyl)-10-phenyl-6,10-dihydro-5H-benzo[h]pyrazolo[3,4-b]quinoline, C₂₈H₂₃N₃, (III), the molecules are linked by C-H [bold pi] (arene) hydrogen bonds into sheets, although the detailed construction of the sheets is entirely different in (II) and (III). The molecules of 7-(4-methoxyphenyl)-8-methyl-10-phenyl-6,10-dihydro-5H-benzo[h]pyrazolo[3,4-b]quinoline, C₂₈H₂₃N₃O, (IV), are linked into a complex three-dimensional framework structure by a combination of C-HN, C-HO and three independent C-H [bold pi] (arene) hydrogen bonds.

Formula: C₂₁H₁₇N₃, C₂₇H₂₁N₃, C₂₈H₂₃N₃ and C₂₈H₂₃N₃O


	Structure factor file (CIF format) (175.3 kbytes) Contains datablock I

	Structure factor file (CIF format) (222.4 kbytes) Contains datablock II

	Structure factor file (CIF format) (234.1 kbytes) Contains datablock III

	Structure factor file (CIF format) (243.1 kbytes) Contains datablock IV

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