Synthesis, Crystal Structure And Magnetic Properties Of 1d Chain Complexes Based On Azo Carboxylate Oxime Ligand

Two carboxylate-bridged one-dimensional chain complexes, {[Mn-II(MeOH)(2)][Fe-III(L)(2)](2)}(n) (1) and {[Mn-II(DMF)(2)][Mn-III(L)(2)](2)center dot DMF}(n) (2) [H2L = ((2-carboxyphenyl)azo)-benzaldoxime], containing a low-spin [Fe-III(L)(2)](-) or [Mn-III(L)(2)](-) unit were synthesized. Magnetic measurements show that the adjacent high-spin Mn-II and low-spin M-III ions display weak antiferromagnetic coupling via the syn-anti carboxyl bridges, with J = -0.066(2) cm(-1) for complex 1 and J = -0.274(2) cm(-1) for complex 2.