Synthesis and magnetic properties of copper (II)-manganese (II) compounds with N,N′-ethylenedisalicylamidatocuprate(II) |
| |
Authors: | Liao Dai-Zheng Zhang Si-Wei Zhang Zhi-Yong |
| |
Abstract: | By the reaction of sodium N,N′-ethylenedisalicylamidatocuprate ( I ) pentahydrate, Na2Cu(samen)]·5H2O, with a manganese ( I ) salt and 2,2′-dipyridyl (bpy) or 1,10-phenanthroline (phen), the binuclear metal complexes Cu(samen) Mn(L)2] (L ? bpy, phen) have been synthesized. Based on IR, elemental analyses and electronic spectra, the complexes are proposed to consist of a four-coordinated Cu( I ) in a distorted planar environment and Mn( I ) in a distorted octahedron. The complexes have been characterized with variable-temperature magnetic susceptibility (4.2—300 K) and the susceptibility data were least-squares fit to susceptibility equation derived from the spin Hamiltonian including single-ion zero-field interaction for Mn2+ ion, H?—2JS1·S2—DS , where D is the axial zero-field splitting parameter for the Mn(II) ion. The exchange integral, J, was found to be —34.6 and —28.8 cm?1 for Cu(samen)Mn(bpy)2] and Cu(samen)Mn(phen)2] respectively. The weak antiferromagnetic spin-exchange interaction can be interpreted by considering σ-π exchange pathway. |
| |
Keywords: | |
|
|