Synthesis and Physico‐Chemical Properties of Some Copper(II) β‐Ketoamines and Their Adducts with 2,2′‐Bipyridine and 1,10‐Phenanthroline

Abstract

The copper(II) β‐ketoamine complexes, {Cu[CH₃C(O)C(Cl)C(CH₃)NR]₂, R=CH₃, C₄H₉} and ketoiminates, {Cu[CH₃C(O)C(Cl)(CH₃)C(‐N(CH₂)_nN‐)C(CH₃)(Cl)CC(O)CH₃], n=2, 6, 8, 9} and their 2,2‐bipyridine (bipy) and 1,10‐phenanthroline (phen) adducts have been synthesized and characterized by elemental analyses, conductance, magnetic susceptibility, infrared and electronic spectral measurements. The available conductance data in nitromethane indicate that the compounds are non‐electrolytes while the room temperature magnetic moments (1.88–2.20 B.M.) suggests the absence of magnetic interaction between the Cu(II) ions. The ketoimine ligands coordinate to the copper atom in a bidentate fashion using the N₂O₂ chromophore to give a four‐coordinate square‐planar geometry. Infrared and electronic spectra results are consistent with the adoption of a six‐coordinate octahedral arrangement for the adducts of the copper(II) complexes with 2,2′‐bipyridine and 1,10‐phenanthroline. Probable structures for the compounds are suggested.

Keywords:

• Copper
• Ketoamines
• Adducts
• Infrared
• Electronic
• Magnetic