Synthesis, Crystal Structures, and Magnetic Properties of One-Dimensional Mixed Cyanide- and Phenolate-Bridged Heterotrimetallic Complexes

Two one-dimensional (1D) cyanide- and phenolate-bridged heterotrimetallic complexes {[Cu II Mn II (L 1 )][Fe III (bpb)(CN) 2 ]} n ·(ClO 4 ) n ·(H 2 O) n ( 1 ) and {[Cu II Mn II (L 1 )][Cr III (bpb)(CN) 2 ]} n ·(ClO 4 ) n ·(H 2 O) n ( 2 ) (bpb 2− = 1,2-Bis(pyridine-2-carboxamido)benzenate) have been designed and prepared based on cyanide-containing building blocks K[M(bpb)(CN) 2 ] [M = Fe(III) and Cr(III)] together with compartmental macrocyclic Schiff-base complex [CuMn(L 1 )]·(ClO 4 ) 2, in which H 2 L 1 is derived from 2,6-diformyl-4-methyl-phenol, ethylenediamine, and diethylenetriamine. Investigation of their magnetic properties reveals the overall antiferromagnetic behavior of these two complexes. These results seem to represent the first example of 1D infinite cyanide- and phenolate-bridged single chain-like compounds containing three kinds of spin carriers 3d-3d′-3d′′prepared by a stepwise method.