Abstract
The structure of the title salt, (C5H7N2)[Fe(C6H4O2)(C6H5O2)], consists of 3-amino-pyridinium cations and 1'-carb-oxy-ferrocene-1-carboxyl-ate monoanions. The ferrocenyl moiety of the anion adopts a typical sandwich structure, with Fe-C distances in the range 2.0270 (15)-2.0568 (17) Å. The anion possesses an eclipsed conformation, with the torsion angle φ (Csubst-Cpcent-Cpcent- Csubst) equal to 66.0°. The conformations of other 1'-carb-oxy-ferrocene-1-carboxyl-ate monoanions are compared and analyzed on the basis of literature data.
Highlights
Fe—C distances in the range 2.0270 (15)–2.0568 (17) Å
We tried to apply the trio of available aminopyridines, namely 2, 3- and 4-aminopyridine, as basic counterparts to ferrocenedicarboxylic diacid
One of the ideas was to check the possibility of obtaining gels with a supramolecular arrangement of the constituents in alcoholic media
Summary
The idea behind this research was to use ferrocenedicarboxylic acid as a dianionic building block in supramolecular polymer and conventional polymer design (Amer et al, 2013; Sun et al., 2016; Zheng et al, 2016). We tried to apply the trio of available aminopyridines, namely 2-, 3- and 4-aminopyridine, as basic counterparts to ferrocenedicarboxylic diacid. One of the ideas was to check the possibility of obtaining gels with a supramolecular arrangement of the constituents in alcoholic media. All those reactions were carried out in a 1:2 ratio of acid–amine in order to exploit both carboxylic acid groups of the diacid. 4-aminopyridine, only amorphous powders could be obtained, the reaction of 3-aminopyridine led to a crystalline salt, 3-aminopyridinium 10 -carboxyferrocene-1-carboxylate, (1), but with a 1:1 composition
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