A General Route to Strictly Dinuclear Cu(II)/Ln(III) Complexes. Structural Determination and Magnetic Behavior of Two Cu(II)/Gd(III) Complexes
- 1 July 1997
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 36 (16) , 3429-3433
- https://doi.org/10.1021/ic970264v
Abstract
Starting from a single precursor, bis(3-methoxysalicylaldehydato)copper (II), which contains an O4Cu chromophore, three routes to discrete dinuclear Cu(II)/Ln(III) complexes (Ln = Pr, Eu, Gd, Yb) are described. The pairs of chromophores occurring in the resulting complexes are either O4Cu/O4Ln or O2N2Cu/O4Ln, the coordination sphere of the Ln ions being completed, in both cases, with six oxygen atoms afforded by three nitrato ions. Two Cu/Gd complexes involving either two tridentate ligands (2) or one hexadentate ligand (7) have been structurally characterized. They crystallize in the monoclinic space groups P21/n (No. 14) (2) and P21/c (No. 14) (7). The cell parameters are a = 9.7185(7) Å, b = 16.7839(12) Å, c = 14.8868(8) Å, β = 97.445(5)°, and Z = 4 (2) and a = 9.7656(9) Å, b = 19.889(2) Å, c = 15.870(2) Å, β = 95.512(9)°, and Z = 4 (7) respectively. The magnetic properties of six Cu/Ln complexes have been determined. A quantitative analysis of the magnetic properties of the Cu/Gd complexes shows that the interaction is of the ferromagnetic type with a J constant varying from 4.8 to 7.0 cm-1. The decrease of the interaction parallels the variation of the dihedral angle between the two halves (OCuO and OGdO) of the bridging core.Keywords
This publication has 15 references indexed in Scilit:
- Solid State and Solution Study of Trinuclear (Ni, Ba, Ni) Complexes: (L12Ni)2Ba(ClO4)2·2H2O (1) and (L22Ni)2Ba(ClO4)2·2H2O (2) (L1 = 3-Methoxysalicylaldiminato and L2 = 3-(2-Methoxyethoxy)salicylaldiminato). Crystal and Molecular Structure of 2Inorganic Chemistry, 1997
- Assembling Processes in a System Comprising Four Constituents: Two Metal Ions (Na, Ni) and Two Anionic Ligands (Perchlorate and 3-(2-Methoxyethoxy)salicylaldiminato(1-))Inorganic Chemistry, 1995
- A Monomeric, Self-Assembling, Alkali-Metal Binding Nickel Complex: Reappraisal of the Original Model from Solid-State and Solution StudiesInorganic Chemistry, 1994
- Ferromagnetically coupled gadolinium(III)copper(II) molecular materialInorganic Chemistry, 1992
- Ferromagnetic Spin-Coupling between Gadolinium(III) and Copper(II) Ions in Discrete Binuclear Gd(III)–Cu(II) ComplexesBulletin of the Chemical Society of Japan, 1991
- Heterometallic Compounds Involving d‐ and f‐Block Elements: Synthesis, Structure, and Magnetic Properties of Two New LnxCu4 ComplexesAngewandte Chemie International Edition in English, 1991
- Ferromagnetic Spin-Coupling in a Binuclear Cu(II)–Gd(III) ComplexChemistry Letters, 1990
- Crystal and molecular structure and magnetic properties of a trinuclear complex containing exchange-coupled GdCu2 speciesInorganic Chemistry, 1986
- Crystal and molecular structure of and magnetic coupling in two complexes containing gadolinium(III) and copper(II) ionsJournal of the American Chemical Society, 1985
- Tricyclische orthokondensierte NebenvalenzringeEuropean Journal of Organic Chemistry, 1933