A new type of one-dimensional cyanide-bridged Cu(II)-Mo(V) bimetallic assembly, [Cu(cyclam)](3)[Mo(CN)(8)](2)(.)5H(2)O (cyclam = 1,4,8,11-tetraazacyclotetradecane), was prepared by self-assembling Mo(CN)(8)(3-) and Cu(cyclam)(2+) ions in a 2:3 stoichiometric ratio. The overall molecular view is delineated as a novel rope-ladder chain structure. It displays a dominant ferromagnetic behavior within a pentanuclear CU3Mo2 unit (J(p) = 3.88 cm(-1)). Interunit ferromagnetic interactions (J(c) = -0.03 cm(-1)) through a longer magnetic pathway of Cu-Mo and weak antiferromagnetic couplings (zJ' = -0.46 cm(-1)) resulting from interchain interactions are obtained.