Figure 3
The two typical arrangements found in crystals of 2,6-disubstituted N-phenylformamides (and thioamides). (a) Hydrogen-bonded chains of type A [example (IIa] with molecules related by the glide plane in the space group Pbca. (b) Hydrogen-bonded chains of type B [example (III)] with molecules related by translation in the space group P212121.  [article HTML]

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