Oxalate-bridged [Cu2(phen)2Cr(OX)3]NO3 and [Cu2(Mebpy)2Cr(OX)3]NO3 (H2OX = oxalic acid, phen = 1,10-phenanthroline, Mebpy = 4,4-dimethyl-2,2-bipyridyl) were prepared and characterized. The temperature dependence of magnetic susceptibilities of complexes was studied in 4.2-300 K range, and the exchange integral Jcu-Cr is 35.18 cm-1 for [Cu2(Mebpy)2Cr(OX)3]NO3 and 30.24 cm-1 for [Cu2(phen)2Cr(OX)3]NO3 on the base of spin Hamiltonian H = -2J (SCu1譙Cr + SCu2譙Cr). The results are commensurate with ferromagnetic interactions between the Cu(II) and Cr(III) ions.

Key words: COPPER COMPLEX, OXALATO COMPLEX, PHENANTHROLINE P, BIPYRIDINE P, CHROMIUM COMPLEX