Syntheses in several systems with copper(2+) ions and three types of aliphatic carboxylate anions (propanoate L$^{C3}$, hexanoate L$^{C6}$, and nonanoate L$^{C9}$), differing in chain length, were carried out. One pyridine-type compound was also added to each of them, namely nicotinamide L$^1$, 3-hydroxypyridine L$^2$, 2-hydroxypyridine L$^3$, and 2-aminopyridine L$^4$. All these syntheses were carried out at three different aqueous concentrations. IR spectroscopy was used to analyze the solid products. The best yields were obtained using L$^2$. One of these compounds with formula [Cu(L$^{C6}$)$_2$(L$^2$)$_2$]n has already been described. The solid product with L$^3$ pyridine ligand was obtained only with propanoate L$^{C3}$ at the highest concentration applied. On the other hand, the remaining L$^1$ and L$^4$ molecules are also found within the solid products, however, their compositions vary depending on concentration and the aliphatic chain length. An application of these copper compounds for coating at a presence of additional water, the nonanoate anion L$^{C9}$ in combination with L$^{2}$ seems to be the optimal solution.
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