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 8
The R₄⁴(24) motif in (II)

. For clarity, bonds to atoms C3–C6 and C11 are shown as thin lines. 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. Coding is indicated by the labelling of selected atoms. For the sake of clarity, the unit-cell outline has been omitted. [Symmetry codes: (i) x − 1, y, z; (ii) 1 − x, $[{1\over 2}]$ + y, 1 − z; (iii) x, $[{1\over 2}]$ + y, 1 − z.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

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

doi:10.1107/S0108270105007547

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