Hydrogen-bonded chains in isostructural 5-meth­yl-2-(4-methyl­phen­yl)-7,8-dihydro-6H-cyclo­penta­[g]­pyra­zolo­[1,5-a]pyrimidine, 2-(4-chloro­phen­yl)-5-meth­yl-7,8-dihydro-6H-cyclo­penta­[g]pyrazolo[1,5-a]pyrimidine and 2-(4-bromo­phen­yl)-5-meth­yl-7,8-dihydro-6H-cyclo­penta­[g]pyrazolo[1,5-a]pyrimidine, and sheets of π-stacked hydrogen-bonded chains in 2-(4-methoxy­phen­yl)-5-meth­yl-7,8-dihydro-6H-cyclo­penta­[g]­pyrazolo[1,5-a]pyrimidine

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

doi:10.1107/S0108270105016720

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 6
Part of the crystal structure of (IV)

, showing the formation via C—H⋯N hydrogen bonds (dashed lines) of a C(7) chain along [010]. For clarity, H atoms not involved in the motif shown have been omitted. Atoms marked with an asterisk (*) or a hash (#) are at the symmetry positions (1 − x, − $[{1\over 2}]$ + y, $[{1\over 2}]$ − z) and (1 − x, $[{1\over 2}]$ + y, $[{1\over 2}]$ − z), respectively.

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 61| Part 7| June 2005| Pages o452-o456

doi:10.1107/S0108270105016720

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