ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Chlorate complexes of copper(II) and cobalt(II) in acetone

Ľ. Macášková and J. Gažo

Slovak Technical University, Bratislava

Abstract: The formation of the chlorate complexes of Cu(II) and Co(II) in acetone was studied spectrophotometrically. The isomolar solns. measured were CuCl₂-NaClO₃-acetone and Cu(NO₃)₂.3H₂O-NaClO₃-acetone and the solns. of the monovariant systems CuCl₂-NaClO₃-acetone, Cu(ClO₄)₂.4H₂O-NaClO₃-acetone, Cu(NO₃)₂.3H₃O-NaClO₃-acetone, and CoCl₂-NaClO₃-acetone. The addn. of NaClO₃ in the acetone soln. and the formation of chloride-chlorate complexes does not change the absorption curve in the visible spectrum at 0.475 μ max., but the absorption intensity is increased. Multinuclear complexes of Cu(II) in which the chlorate acts as a bridge are probably formed. The absorption spectra were also not changed in the system Cu(NO₃)₂.3H₂O-NaClO₃-acetone. In the system CoCl₂-NaClO₃-acetone with the formation of chloride-chlorate Co(II) complexes, a new absorption band at max. 0.592 μ and a shift of chloride-Co(II) complex band in acetone to longer wavelength (0.662 μ) was found. Complexes with the heterogeneous coordination sphere contg. Cl^- and ClO^3- as ligands were probably formed.

Full paper in Portable Document Format: 199a673.pdf (in Slovak)

Chemical Papers 19 (9) 673–678 (1965)