Six closely related 4,6-disubstituted 2-amino-5-formyl­pyrimidines: different ring conformations, polarized electronic structures, and hydrogen-bonded assembly in zero, one, two and three dimensions

Acosta, L.M.; Yepes, A.F.; Palma, A.; Cobo, J.; Glidewell, C.

doi:10.1107/S0108270112051049

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 7
Part of the crystal structure of compound (VI)

, showing the formation of a hydrogen-bonded (dashed lines) chain of alternating R₄²(8) and R₂²(20) rings along [010]. For the sake of clarity, H atoms other than those bonded to atom N21 have been omitted. Atoms marked with an asterisk (*), a hash symbol (#), a dollar sign ($) or an ampersand (&) are at the symmetry positions (x, y + 1, z), (x, y − 1, z), (−x, −y + 1, −z) and (−x, −y, −z), respectively.

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 69| Part 2| January 2013| Pages 162-171

doi:10.1107/S0108270112051049

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