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

Copper(II) cyanato complexes in acetone

M. Quastlerová and Z. Valtr

Slovak Technical University, Bratislava

Abstract: The formation, compn., and relative stability of Cu(II) complexes contg. cyanate groups as ligands were studied spectrophotometrically in Me₂CO. At concns. of 10-5-10-4M the following systems were studied: CuCl₂-LiOCN-Me₂CO, Cu(NO₃)₂.3H₂O-LiOCN-Me₂CO, Cu-(ClO₄)₂.6H₂O-LiOCN-Me₂CO, either as isomolar solns. or monovariant systems. The addn. of LiOCN increases the intensity of the absorbance at 475 mμ in CuCl₂-Me₂CO soln., indicating the formation of a complex in the system CuCl₂-LiOCN-Me₂CO, with a [Cu²⁺]:[OCN-] ratio of 1:1.5. The OCN^-. group can bond to Cu through N or O and functions as a bridge between 2 central Cu atoms. The addn. of LiOCN to the systems Cu-(NO₃)₂.3H₂O-LiOCN-Me₂CO and Cu(ClO₄)₂.6H₂O-LiOCN-Me₂CO does not change the absorbance of Cu indicating a lower capacity of the OCN^- group to enter the inner sphere of Cu complexes.

Full paper in Portable Document Format: 2010a795.pdf (in Czech)

Chemical Papers 20 (10) 795–801 (1966)