One-Dimensional Octacyanomolybdate-Based Cu(II)−Mo(V) Bimetallic Assembly with a Novel Rope-Ladder Chain Structure

A new type of one-dimensional cyanide-bridged Cu(II)−Mo(V)
bimetallic assembly, [Cu(cyclam)]3[Mo(CN)8]2·5H2O (cyclam
= 1,4,8,11-tetraazacyclotetradecane), was prepared by self-assembling Mo(CN)83- 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 (Jp = 3.88 cm-1).
Interunit ferromagnetic interactions (Jc = −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.