N6-Substituted 2-amino-4-chloro-5-formylpyrimidines: puckered versus planar pyrimidine rings, and hydrogen-bonded aggregation in zero, one, two and three dimensions

Cobo, J.; Trilleras, J.; Quiroga, J.; Marchal, A.; Nogueras, M.; Low, J.N.; Glidewell, C.

doi:10.1107/S0108768108019915

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 10
Parts of the crystal structure of (XII) showing the formation of three distinct chain motifs: (a) a C(8) chain parallel to [101], where the atoms marked with an asterisk (*) or a hash (#) are at the symmetry positions ( $[-{1\over 2}+ x, {1\over 2} - y, -{1\over 2} + z]$ ) and ( $[{1\over 2} + x, {1\over 2} - y, {1\over 2} + z]$ ), respectively; (b) a C(4) chain parallel to [001], where the atoms marked with an asterisk (*) or a hash (#) are at the symmetry positions ( $[x, 1 - y, {1\over 2} + z]$ ) and (x, $[1 - y, -{1\over 2} + z]$ ), respectively; (c) a stereoview of a C₂²(12) chain parallel to [110]. In each case the H atoms bonded to C atoms have been omitted.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 64| Part 5| September 2008| Pages 596-609

doi:10.1107/S0108768108019915

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