 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 2]](og5060fig2mag.jpg)
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Figure 2
Formation of multiple interactions by ethynyl groups: (a) C—C≡C—H⋯O and O—H⋯ π(C≡C) bonds in BETXAZ (Lin et al., 1982  ); (b) C—C⋯C—H⋯π(phenyl) and N—H⋯π(C≡C) and C(phenyl)—H⋯π(C≡C) in BUPQAE01 (Dey et al., 2003); (c) C—C≡C—H⋯O and C—C≡C—H⋯π(C≡C) bifurcation together with O—H⋯ π(C≡C) bonds in PICMAQ (Milroy et al., 2007). Note that Mercury (Macrae et al., 2006, 2008) draws triple bonds on the surface of a cylinder which are clearly visible when manipulated in three dimensions. In planar views it is not always possible to show all three `components' of the triple bond and these bonds look like double bonds in most diagrams shown in this paper. |
![[Figure 2]](og5060fig2.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
