4-Oxo-N-phenyl-4H-chromene-2-carboxamide and of a new polymorph of 7-meth­oxy-4-oxo-N-p-tolyl-4H-chromene-2-carboxamide and its hemihydrate

Reis, J.; Gaspar, A.; Borges, F.; Gomes, L.R.; Low, J.N.

doi:10.1107/S0108270113029727

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 8
Part of the structure of (1), showing the chain of linked centrosymmetric dimers formed by the action of the weak C7—H7⋯O2ⁱⁱⁱ centrosymmetrically related hydrogen bonds (see Table 3

for details). Hydrogen bonds are indicated by dashed lines. H atoms not involved in hydrogen bonding have been omitted for clarity.

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 69| Part 12| November 2013| Pages 1527-1533

doi:10.1107/S0108270113029727

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