Effect of substitution on the dimensionality of supramolecular aggregation in dihydrobenzo-pyrazoloquinolines

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

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6 Citations (Scopus)

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-H center dot center dot center dot N 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 center dot center dot center dot 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-H center dot center dot center dot N, C-H center dot center dot center dot O and three independent C-H center dot center dot center dot pi(arene) hydrogen bonds.

Original languageEnglish
Number of pages7
JournalActa Crystallographica Section C-Crystal Structure Communications
Volume61
DOIs
Publication statusPublished - Aug 2005

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