Four 2-amino-6-aryl-4-meth­oxy-11H-pyrimido[4,5-b][1,4]benzodiazepines: similar mol­ecular structures but different crystal structures

Rodríguez, R.; Cobo, J.; Nogueras, M.; Low, J.N.; Glidewell, C.

doi:10.1107/S010827010803669X

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 2
A stereoview of part of the crystal structure of (I)

, showing the formation of a sheet of alternating R₂²(8) and R₆⁶(36) rings parallel to (10 $[\overline{1}]$ ) formed by two independent N—H⋯N hydrogen bonds. For the sake of clarity, H atoms bonded to C atoms have been omitted. Entirely analogous sheets can be identified in the structures of (II)

and (III)

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 64| Part 12| November 2008| Pages o643-o648

doi:10.1107/S010827010803669X

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