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EPR studies of the 3D anionic networks {;[Cu(bpy)3][M2(C2O4)3]•H2O};n (M=Cu2+, Mn2+)

The homometallic {;[Cu(bpy)3][Cu2(C2O4)3]·H2O};n (1) and the heterometallic {;[Cu(bpy)3][Mn2(C2O4)3]·H2O};n (2) compounds (bpy = 2, 2'-bipyridine) have been synthesized. The structures of both compounds consist of a 3D, polimeric anionic network [M2(C2O4)3]n2n– (where M = Cu2+ or Mn2+) with cations [Cu(bpy)3]2+ occupying the vacancies of the framework. So far, only a few single-crystal structures of this type of 3D metal oxalates have been described. Electron paramagnetic resonance (EPR) measurements performed by an X-band spectrometer on a polycrystalline sample of 1 and on a single crystal of 2, in the temperature range 300–5 K, are presented.

EPR; copper(II); manganese(II)

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