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![[Figure 4]](dg3058fig4mag.jpg)
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Figure 4
(a) Molecular recognition of monodeprotonated oxamate fragments via hydrogen bonds (orange dotted lines) leading to a 2D supramolecular network running parallel to the crystallographic ac plane. C, O and N atoms are coloured in gray, red and blue, respectively. (b) Crystal packing along the crystallographic b axis, showing the n-Bu4N+ ions mediating the van der Waals interactions between the metal complexes and solvent molecules. Colour code: [Er(H2O)(Htmpa)4]− complex anions in gray, n-Bu4N+ cations in pink, voids containing the trapped DMSO and water molecules in orange, and the remaining crystallization molecules in green. |
![[Figure 4]](dg3058fig4.jpg)
 | STRUCTURAL CHEMISTRY |
ISSN: 2053-2296
