Polynuclear complexes of 3d and 4f transition metals. Synthesis and structure of lanthanide(III) adducts with copper and nickel Schiff"s base complexes as ligands

摘要: Abstract The synthesis and characterization of trinuclear complexes containing both 3d 4f metal ions is presented: Ln(NO 3 ) [Cu(salpn)] 2 (Ln = Eu, Dy) [Ni(salpn)(pn)] ·2H O La-Lu). crystal molecular structure Ce(NO − ·CH NO has been determined by single-crystal X-ray diffraction. complex forms orthorhombic crystals, space group Fdd (ITC No 43), a 19.479(2), b 26.980(2), c 30.698(2) A, Z 16. was solved Patterson Fourier techniques refined least squares to final conventional R F 0.045 (R w 0.052). Ce(III) ion 10-coordinate, with an irregular coordination polyhedron. This polyhedron may be best described as trigonal bipyramidal arrangement five bidentate ligands, two axial nitrates, one equatorial nitrate [Cu- (salpn)] ligands. average CeO bond length 2.53(10) A. Cu(II) form distorted octahedral CuN 4 square-based pyramidal chromophores, respectively. A molecule nitromethane links pairs molecules, related twofold axis, into dimers. Cell parameters could also for Sm(NO : 10.309(2), 14.768(2), 10.998(1) nickel isomorphous series their discussed on the basis spectroscopic data comparison copper complexes.