Two novel cyano-bridged rare earth-iron complexes have been synthesized based on the reaction of K3Fe(CN)(6), Ln(NO3)(3). 6H(2)O (Ln = Sm, Gd) and N,N-dimethylacetamide (DMA). It is interesting that the two complexes exhibit the different coordination form and crystal structure, in which [sm(DMA)(2)(H2O)(4)Fe(CN)(6). 5H(2)O](n) ([SmFe](n)), shows one-dimensional chain structure with approximately parallel two CN bridging ligands between Sm atom and Fe atom, while {[Gd(DMA)(3)(H2O)(4)](2)Fe(CN)(6)}Fe(CN)(6). 3H(2)O ([Gd2Fe]) is an isolated trinuclear Gd(1)-Fe-Gd(2) complex with two approximately perpendicular CN bridging ligands between the two Gd atoms and Fe atom. Among [SmFe](n) complex exhibits critical temperature T-c = 3.5 K.