| Summary: | 碩士 === 輔仁大學 === 化學系 === 98 === The syntheses, crystal structures, magnetic properties and theoretical calculation are reported for two new iron clusters
[Fe3O(mpmae)2(OAc)2Cl3](1),[Fe8O4(mpmae)4(OAc)10] (PF6)2∙(Et2O)2∙2CH2Cl2(2),we use contain tridentate N,N,O chelate
(mpmaeH=2-(N-methyl-N-((pyridin-2-yl)methyl)amino)ethanol),with iron(III) to synthesize iron-oxo complex. And variable-temperature, solid-state dc, magnetization studies were carried out on complexes 1-2 in the 5.0-300 K range , the magnetic susceptibility data for 1and 2 were fit to the theoretical χMT vs. T expression derived by the use of an isotropic Heisenberg spin Hamiltonian and the Van-Vleck equation, and this revealed the pairwise exchange parameters to be antiferromagnetic with values of J12 = -21.5cm-1 and J23 = -74.5cm-1for 1; the J value in the content for 2.
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