In:
Acta Crystallographica Section C Crystal Structure Communications, International Union of Crystallography (IUCr), Vol. 69, No. 12 ( 2013-12-01), p. 1537-1540
Kurzfassung:
Two products from the proton-transfer reactions of benzene-1,2,4,5-tetracarboxylic acid (pyromellitic acid, PMA) with 2,2′-biimidazole and 4,4′-dimethyl-2,2′-bipyridine, namely 2,2′-biimidazole-3,3′-diium 2,5-dicarboxybenzene-1,4-dicarboxylate, C 6 H 8 N 4 2+ ,C 10 H 4 O 8 2− , (I), and 4-methyl-2-(4-methylpyridin-2-yl)pyridinium 2,4,5-tricarboxybenzoate monohydrate, C 12 H 13 N 2 + ·C 10 H 5 O 8 − ·H 2 O, (II), have been prepared and their structures determined. Both compounds crystallize in the space group P \overline{1}. The asymmetric unit of (I) is composed of two independent ion pairs. Both the 2,2′-biimidazole-3,3′-diium dication and the PMA 2− anion are located on special positions (inversion centres). The protonated 2,2′-biimidazole-3,3′-diium ring H atoms are involved in hydrogen bonding with carboxylate O atoms to form one-dimensional hydrogen-bonded chain structures. Adjacent chains are further linked via carboxyl–carboxyl O—H...O hydrogen bonding, resulting in a two-dimensional supramolecular sheet with the R 6 5 (34) motif extending in the (1\overline{2}1) plane. In (II), classical O—H...O hydrogen-bond-linked anion–anion units are extended into a one-dimensional chain running parallel to the [100] direction, giving an R 2 2 (8) R 4 4 (30) motif. The chains are connected by water–carboxyl O—H...O hydrogen bonds to form a two-dimensional network parallel to the (01\overline{1}) plane. The 4-methyl-2-(4-methylpyridin-2-yl)pyridinium cations lie between the two-dimensional supramolecular layers linked via N—H...O hydrogen-bonding interactions.
Materialart:
Online-Ressource
ISSN:
0108-2701
DOI:
10.1107/S0108270113030801
DOI:
10.1107/S0108270113030801/sf3209sup1.cif
DOI:
10.1107/S0108270113030801/sf3209Isup2.hkl
DOI:
10.1107/S0108270113030801/sf3209IIsup3.hkl
DOI:
10.1107/S0108270113030801/sf3209Isup4.cml
DOI:
10.1107/S0108270113030801/sf3209IIsup5.cml
Sprache:
Unbekannt
Verlag:
International Union of Crystallography (IUCr)
Publikationsdatum:
2013
ZDB Id:
2025703-X
SSG:
13
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