2-(2-Acetyl­amino-5-chloro­phenyl)-2,2-difluoro­ethanoic acid and 2-(2-acetyl­amino-5-methyl­phenyl)-2,2-difluoro­ethanoic acid, and 2-(2-acetyl­amino­phenyl)-2,2-difluoro-N-phenyl­acetamide and 2-(2-acetyl­amino­phenyl)-N-(4-chloro­phen­yl)-2,2-difluoro­acetamide: examples of variation in mol­ecular packing and hydrogen-bonding motif induced by substituent change

Boechat, N.; Maciel, L.C.; Pinto, A.C.; Wardell, S.M.S.V.; Skakle, J.M.S.; Howie, R.A.

doi:10.1107/S0108270105007547

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 6
The hexamolecular R₆⁴(26) motif in (I)

. For clarity, bonds to atoms C3–C6 are shown as thin lines. Displacement ellipsoids are drawn at the 50% probability level and H atoms involved in hydrogen bonds (dashed lines) are shown as small spheres of arbitrary radii. Selected atoms are labelled, primarily to provide a key for the coding of the ellipsoids, which is the same for all of Figs. 6

–9

, 11

and 13

. For the sake of clarity, the unit-cell outline has been omitted. [Symmetry codes: (i) 1 − x, 1 − y, 1 − z; (iii) 1 − x, $[{1\over 2}]$ + y, $[{3\over 2}]$ − z; (iv) 1 − x, 1 − y, 2 − z; (v) x, y, 1 + z; (vi) x, $[{1\over 2}]$ − y, $[{1\over 2}]$ + z.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 61| Part 5| April 2005| Pages o270-o275

doi:10.1107/S0108270105007547

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