Synthesis and spectral characterization of copper(II), nickel(II), cobalt(II), oxovanadium(IV) and ruthenium(II) complexes of some conjugated 2-hydroxyacetophenones

A few metal complexes of the type ML2nB (where M=Cu(II), Ni(II), Co(II) and VO(II); L=2-hydroxy-ω-2'-furylacryloyl)-acetophenone(HFA); B=H2O; n=0,2) and Ru(II) complexes of 2-hydroxy-ω-(4-X-phenylcinnamoyl) acetophenones (HXCA) (where X=H, Cl, Me or OMe) have been prepared and characterized by elemental analysis, IR, electronic and ESR spectra and magnetic susceptibility studies. The ligands coordinate through carbonyl and enolic oxygens. From the ESR spectra it is observed that copper(II) and vanadyl(IV) complexes are monomers. (author)