CYANIDE-BRIDGED BI- AND TRINUCLEAR HETEROBIMETALLIC Fe(III)-Mn(III) COMPLEXES: SYNTHESIS, CRYSTAL STRUCTURES AND MAGNETIC PROPERTIES
H. Zhang1, L. Kong2, D. Zhang1
1Shandong University of Technology, Zibo 255049, P. R. China
dpzhang73@126.com
2Liaocheng University, Liaocheng 252059, P. R. China
Ключевые слова: cyanide-bridged, hydrogen bond, synthesis, crystal structure, magnetic properties
Страницы: 1594-1600
Аннотация
By employing trans -dicyano or pentacyanometalate as building block and using a bicompartimental Schiff-base based manganese(III) compound as assemble segment, two new cyanide-bridged heterometallic Fe(III)-Mn(III) complexes {[Mn(L)(H2O)][Febpb(CN)2]}×2CH3OH (1) and {[Mn(L)(H2O)]2×[Fe(CN)5NO]} (2) (bpb2- = 1,2-bis(pyridine-2-carboxamido)benzenete, L = N,N¢-ethylene-bis(3-ethoxysalicylideneiminate) have been synthesized and characterized by elemental analysis, IR spectroscopy and X-ray structure determination. Single X-ray diffraction analysis reveals binuclear FeMn and trinuclear FeMn2 structure, respectively, in which the cyanide precursor acts as mono- or bidentate ligand to connect the Mn(III) Schiff-base unit(s). Furthermore, these two complexes are self-complementary through coordinated aqua ligands from one complex and the free O4 compartments from the neighboring complex, giving dimeric and 1D single chain supramolecular structure. Investigation of the magnetic susceptibility of 1 reveals weak antiferromagnetic coupling between the adjacent Mn(III) ions. Based on the binuclear FeMn model, best fit of the magnetic susceptibilities of 1 leads to the magnetic coupling constants J = -1.37 cm-1 and zJ ¢ = - 0.72 cm-1 (1).
DOI: 10.15372/JSC20150811 |
