Syntheses, structures and magnetic studies of three heterometallic Fe2Ln 1D coordination polymers

Three new heterometallic 1D coordination polymers [FeIII2Pr(4-Me-sal)4(2,2′-bipy)2(H2O)6](NO3) · 2MeOH · 1.5H2O (1), [FeIII2Gd(4-Me-sal)4(2,2′-bipy)2(H2O)5]Cl1/2(NO3)1/2 · 5H2O (2) and [FeIII2Dy(4-Me-sal)4(2,2′-bipy)2(H2O)5]Cl1/2(NO3)1/2 · 5H2O (3) have been synthesized and structurally characterized. Magnetic studies show that the three compounds show a similar temperature dependence of their magnetic susceptibilities over the range 1.8-300 K.