Four N7-benzyl-substituted 4,5,6,7-tetra­hydro-1H-pyrazolo[3,4-b]pyri­dine-5-spiro-1′-cyclo­hexane-2′,6′-di­ones as ethanol hemisolvates: similar mol­ecular constitutions but different crystal structures

Cruz, S.; Trilleras, J.; Cobo, J.; Low, J.N.; Glidewell, C.

doi:10.1107/S0108270108036937

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 2
The centrosymmetric hydrogen-bonded dimer formed in each of the isomorphous compounds (I)

–(III)

. For the sake of clarity, the half-occupancy ethanol molecules, H atoms not involved in the hydrogen-bonded motif shown, and the unit-cell outline have all been omitted. The atom marked with an asterisk (*) is at the symmetry position ( $[{1\over 2}]$ − x, $[{3\over 2}]$ − y, 1 − z).

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 64| Part 12| November 2008| Pages o637-o642

doi:10.1107/S0108270108036937

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