view article
Figure 8
The mol­ecular packing in (Ia)[link] and (Ib)[link], shown for the major component of disordered (Ia)[link]. For clarity, only the H atoms in the bridge and others involved in inter­molecular contacts are shown. Dashed lines indicate contacts at or shorter than the sum of the van der Waals radii. The bridge N—H group participates in a weak hydrogen bond, but the bridge C—H group does not participate in hydrogen bonding (see Tables 1[link] and 2[link] for N—H contact geometries). Centrosymmetric close-contact motifs shown here are defined by paired C—X⋯H—C inter­actions, where X = Cl in (Ia)[link] and X = Br in (Ib)[link] [the R22(8) motif], and paired C≡N⋯H—C inter­actions [the R22(10) motif]; see Comment for contact geometries. [Symmetry codes: (i) x + 1, y, z; (ii) −x, −y + 2, −z + 1; (iii) −x + 2, −y + 2, −z.]

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 68| Part 7| July 2012| Pages o270-o278
doi:10.1107/S0108270112026443
Follow Acta Cryst. C
Sign up for e-alerts
E-alerts
Follow Acta Cryst. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS