Molecular conformation and supramolecular aggregation in two fused pyrazoles: π-stacked R_{\bf 2}^{\bf 2}(6) dimers in 2,8,8-tri­methyl-6,7,8,9-tetra­hydro­pyrazolo­[2,3-a]­quinazolin-6-one, and sheets of alternating R_2^2(12) and R_6^6(48) rings in 3-tert-butyl-4′,4′-di­methyl-1-phenyl-4,5,6,7-tetra­hydro-1H-pyrazolo­[3,4-b]­pyridine-5-spiro-1′-cyclo­hexane-2′,6′-dione

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

doi:10.1107/S0108270104004159

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 5
Part of the crystal structure of (II

), showing the formation of an [R_2^2]

(12) dimer. For clarity, H atoms not involved in the motif shown have been omitted. Atoms marked with an asterisk (*) are at the symmetry position (1 − x, 1 − y, 1 − z).

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 60| Part 4| March 2004| Pages o265-o269

doi:10.1107/S0108270104004159

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