Crystal structure and magnetic properties of a Ce-III-Cu-II heterodinuclear complex

摘要

Crystal structure and magnetic properties of a heterodinuclear complex, LCu(Me2CO)Ce(NO3)O-3 (L = (N,N'-propylene-bis(3-methoxysalicylideneimine)) are reported. (C19H22N2O4)Cu(C3H6O) Ce(NO3)(3), monoclinic, space group P2(1)/c, with a = 9.8295(4), b 19.049(3), c = 15.668(3) Angstrom, beta = 94.873(12)degrees, V = 2923.2(7) Angstrom(3), Z = 4. The central region of the complex is occupied by Cu-II and Ce-III ions which are bridged by two phenolato oxygen atoms of the ligand. The copper ion adopts a square-based 4+1 coordination made, the equatorial N2O2 donors being afforded by the ligand while the axial position is occupied by an oxygen atom of the acetone molecule. The Ce-III ion is deca-coordinated. In addition to the two phenolate oxygen atoms, the coordination sphere contains two oxygen atoms of the OMe side arms of L and six oxygen atoms from the three bidentate nitrate ions. The Ce...Cu separation is 3.601(2) Angstrom. and the dihedral angle between the CeO(2)Cu and CeO(3)Cu planes is 17.4(1)degrees. The magnetic susceptibility of the complex was measured over the range 5-350 K. The magnetic properties of the investigated compound are dominated by the crystal field effect on the Ce-III site, masking the magnetic interaction between the paramagnetic centers. [References: 17]