 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 2]](de5006fig2mag.jpg)
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Figure 2
(a) The asymmetric unit of IIc with a fully ordered peptide cation and a nitrate anion that is distributed over two mutually exclusive positions B and C, each with occupancy 0.50. Disordered cocrystallized solvent has been modeled by the refinement of three isotropic C atoms, depicted here as dotted spheres of arbitrary size. (b) The asymmetric unit of IIdc. The two peptides are related by a pseudo-twofold rotation axis. There are two nitrate anion sites called C and D, with three and one different nitrate positions, respectively. The two least populated positions for site C are shown with dashed lines and no atom names. Line drawings are used for the three acetonitrile solvent molecules, while the position of an O atom used to model remaining diffuse electron density is shown as a dotted sphere of arbitrary size. (c) The molecular structure of IIz dihydrate. (d) The structures of the peptide anion A (left) and B (right) in IIa. Displacement ellipsoids are shown at the 50% probability level, with H atoms as spheres of arbitrary size |
![[Figure 2]](de5006fig2.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
