284
T. Mutai
Fig. 14.7 Crystal structure of 2-Y. Top and side views of the columnar packing (a) and molecular
packing viewed from bc plane (b). Mutai et al. [89]—Reproduced by permission of The Royal
Society of Chemistry
Fig. 14.8 Crystal structure of 2-O. Top view of dimer (a) and molecular packing viewed from
ab plane (b). Mutai et al. [89]—Reproduced by permission of The Royal Society of Chemistry
Fig. 14.9 Crystal structure of 2-R. Top and side views of the columnar packing (a) and molecular
packing viewed from bc plane (b). Mutai et al. [89]—Reproduced by permission of The Royal
Society of Chemistry
overlaps with the phenyl moiety of the stacked molecule. The distance between an
oxygen atom and the nearest nitrogen atom of a neighbor molecule is 3.64 Å, which
ruled out the formation of an intermolecular hydrogen bond. As for the intercolumnar
packing, every two columns aligned in an antiparallel fashion, to form a herringbonelike arrangement along the c-axis (Fig. 14.7b).
In 2-O, antiparallel π–π stacked dimeric units formed with an interplanar distance
of 3.35 Å (Fig. 14.8a). The imidazolyl moieties overlapped, and the phenyl moiety
overlaid the fused pyridyl group. Neighboring dimeric units packed in an edge-toface type arrangement (Fig. 14.8b), which was similar to that observed in 1-BG
(Fig. 14.1) [61].
T. Mutai
Fig. 14.7 Crystal structure of 2-Y. Top and side views of the columnar packing (a) and molecular
packing viewed from bc plane (b). Mutai et al. [89]—Reproduced by permission of The Royal
Society of Chemistry
Fig. 14.8 Crystal structure of 2-O. Top view of dimer (a) and molecular packing viewed from
ab plane (b). Mutai et al. [89]—Reproduced by permission of The Royal Society of Chemistry
Fig. 14.9 Crystal structure of 2-R. Top and side views of the columnar packing (a) and molecular
packing viewed from bc plane (b). Mutai et al. [89]—Reproduced by permission of The Royal
Society of Chemistry
overlaps with the phenyl moiety of the stacked molecule. The distance between an
oxygen atom and the nearest nitrogen atom of a neighbor molecule is 3.64 Å, which
ruled out the formation of an intermolecular hydrogen bond. As for the intercolumnar
packing, every two columns aligned in an antiparallel fashion, to form a herringbonelike arrangement along the c-axis (Fig. 14.7b).
In 2-O, antiparallel π–π stacked dimeric units formed with an interplanar distance
of 3.35 Å (Fig. 14.8a). The imidazolyl moieties overlapped, and the phenyl moiety
overlaid the fused pyridyl group. Neighboring dimeric units packed in an edge-toface type arrangement (Fig. 14.8b), which was similar to that observed in 1-BG
(Fig. 14.1) [61].