Stereoscopic representation

Figure 9 A second way to represent the molecular structure of CaTiOj. (a) Common representation (b) stereoscopic representation. Symbols as in Figure 8...

Fig. 1 Stereoscopic representation of the molecular packing of exo-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxyanhydride (1) on its (001) face (rotated aroundyby 5° for abetter view) showing the hardly interpenetrated monolayered structure...

Figure 5-14 (A) Stereoscopic drawing showing two layers of water molecules that form a "spine" or "ribbon" of hydration in the minor groove of B-DNA. The inner layer is shown as larger filled circles water molecules of the outer layer are depicted with smaller dots and are numbered. Hydrogen bonds are shown as dashed lines. (B) Electron density map. (A) and (B) from Tereshko et at.95 (C) Stereoscopic representation of the superimposed electron densities of 101 water molecules observed to hydrate 14 guanine rings found in 14 B-DNA molecules for which high-resolution X-ray structures were available. Positions of 101 water molecules within 0.34 nm from any atom of the 42 guanines are plotted. From Schneider and Berman.94...

Figure 2. Stereoscopic representations of the crystal structure for aspartame (Form I). (a) unit cell, showing phenyl rings interacting in the center of each cell and hydrogen-bonded water molecules at the edges (b) columnar representation, showing hydrogen-bonded stacks of water molecules and zwitterionic aspartyl amino and carboxylate groups in center with stacked phenyl rings at edges. Reproduced from [9].

Figure 2.1.19 Stereoscopic representation of the crystal packing of 25 (Cc) [53] on (010) but turned around Y by 10° for a better view showing layers of steep molecules (62°) that interlock in the cleavage plane, which is not suitable for migration.

Figure 2.1.30 Stereoscopic representation of the crystal packing of benzimidazole 9 (Pna2i) [69] along [010] turned around Y by 2° for a better view, showing vertical stacks linked by hydrogen bonds forming heavily interlocked horizontal bilayers and almost square channels along [010].

Figure 2.1.31 Stereoscopic representation of the crystal packing of antipyrine 45 (C2/c) [71] along [001] showing elliptical channels that do not involve the nitrogen atoms, the projected plane calculates (-1 0 2.3) the (010) face is on top of the image.

Figure 2.1.32 Stereoscopic representation of the crystal packing of46 (P43) [73] including hydrogen bonds, showing both square polar and rectangular nonpolar channels along [001].

Figure 2.1.48 Stereoscopic representation of the crystal packing of 63 (P2i/n) [6] on (001) but rotated around Y by 10° and hydrogens omitted for a better view the polar voids are filled with acetone unlike the empty nonpolar voids.

Figure 2.1.49 Stereoscopic representation of the crystal packing of 64a on (110) showing layers that very strongly interlock and a pair of the closely arranged molecules that cannot photodimerize due to lack of migrational capability of the crystal.

The plasmodial enzyme must have some significant differences from that of other sources. Certain variations of particular amino acids have been identified and even related to tertiary structural features of the pockets into which the pteridine nucleus fits. Stereoscopic representations generated from X-ray diffraction data have been obtained from DHFR co-crystallized with MTX, and the co-enzyme NADPH has helped elucidate goodness of fit, or its absence, of the inhibitor. 

Figure 22. Stereoscopic representation of the molecular packing of 13 on (100), turned by 10° for a better perspective with (010) on top.

Figure 32. Space-filling stereoscopic representation of the molecular packing of 33 (P2,2t21) with (001) facing down the more important half-boat conformer out of the 60/40-disorder due to the cyclohexene ring is depicted exclusively 16-unit cells are shown double bond-C with grid, O with circles, N with circled dots.

Figure 3. Stereoscopic representations of surrounding found in the crystalline state of a Cellobiose (4) b Methyl B-D-cellobioside (5).

Figure 11. Stereoscopic representation of the unit cell content of crystalline cellotetraose.

Fig. 8.8. A stereoscopic representation of the conformation of the peptide chains of mon-ellin top) and thaumatin bottom) (the location of tryptic peptides that cross react with heterologous antibodies is indicated by thicker lines) (according to Kim et aL, 1991)...

Fig. 14.37. The spin stiucture of TbCu2 at 4.2 K from neutron diffraction results of Brun et al. (1971). This is a stereoscopic representation in which the left and right images are to be viewed by the right and left eyes respectively. This can be achieved either by direct observation with the lines of vision crossed, or by means of a pair of viewers in which case diapositives of the two separate images are required. Only the Tb atoms are drawn. The plane of the figure is the a-c plane, with spins in the a-direction. The spin stiucture can be regarded as ferrimagnetic within an a-c plane, of the spins up, and down. The spin directions are reversed from plane to plane, giving a net antiferromagnetism.

---