Infrared and diffuse reflectance spectra of copper(II) complexes of pyridine-2-carbaldehyde oxime

Abstract

The i.r. and diffuse-relectance spectra are reported and discussed for the complexes Cu(pa)paH)X [where paH = pyridine-2-carbaldehyde oxime (C₆H₆N₂O), pa = C₆H₅N₂O, X = Cl, Br, I, No₃, or HSO₄] and Cu(paH)Cl₂, Cu(paH)SO₄, Cu(paH)SO₄,H₂O, and Cu(paH)₂SO₄,2½H₂O. The spectra support the suggestions that Cu(pa)(paH)X contains a square planar [Cu(pa)(paH)]⁺ group and also indicates that these groups are linked by weakly co-ordinated anions. The remaining complexes appear to have a less tetragonally distorted octahedral structure.