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- W2521641840 abstract "The asymmetric unit of the title molecular salt, [C 5 H 7 N 2 + ][(HO) 2 OP(CH 2 ) 9 PO 2 (OH) − ], consists of one 4-aminopyridinium cation and one hydrogen (9-phosphonononyl)phosphonate anion, both in general positions. As expected, the 4-aminopyridinium moieties are protonated exclusively at their endocyclic nitrogen atom due to a mesomeric stabilization by the imine form which would not be given in the corresponding double-protonated dicationic species. In the crystal, the phosphonyl (–PO 3 H 2 ) and hydrogen phosphonate (–PO 3 H) groups of the anions form two-dimensional O—H...O hydrogen-bonded networks in the ab plane built from 24-membered hydrogen-bonded ring motifs with the graph-set descriptor R 6 6 (24). These networks are pairwise linked by the anions' alkylene chains. The 4-aminopyridinium cations are stacked in parallel displaced face-to-face arrangements and connect neighboring anionic substructures via medium–strong charge-supported N—H...O hydrogen bonds along the c axis. The resulting three-dimensional hydrogen-bonded network shows clearly separated hydrophilic and hydrophobic structural domains." @default.
- W2521641840 created "2016-09-30" @default.
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- W2521641840 date "2016-09-23" @default.
- W2521641840 modified "2023-10-18" @default.
- W2521641840 title "Hydrogen bonding, π–π stacking and van der Waals forces-dominated layered regions in the crystal structure of 4-aminopyridinium hydrogen (9-phosphonononyl)phosphonate" @default.
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- W2521641840 doi "https://doi.org/10.1107/s2056989016014298" @default.
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