Magnetic Susceptibilities of Aqueous Solutions of the Copper(II) Compounds with ω-Pyridiniocarboxylate

Copper(II) compounds: CuCl2[C5H5NCH2COO]·3H2O, CuCl2[C5H5N(CH2)nCOO]·2H2O (n = 2, 3), and CuCl2[C5H5N(CH2)nCOO]2 (n = 1—3) were prepared. Then they were characterized by means of magnetic susceptibility and IR spectroscopy. The equilibria between mono- and dinuclear species in their aqueous solutions were studied using magnetic susceptibility measurements. The tendency for adopting dinuclear species in water increased in the order: pyridinioacetate < 3-pyridiniopropionate < 4-pyridiniobutyrate.