An infinite 1D hydrogen-bonded polymer built from an azido cobalt(III) tetraaza macrocyclic complex

A new complex of composition {[Co(L1)(N3)2]·ClO4}n (1) (L1=3,14-dimethyl-2,6,13,17-tetraazatricyclo[14.4.01.18.07.12]docosane) has been synthesized and structurally characterized by a combination of analytical, spectroscopic, and crystallographic methods. The cobalt(III) ion in 1 shows an octahedral geometry with four nitrogen atoms from the tetraaza macrocycle and two nitrogen atoms from the azide ligands. The [Co(L1)(N3)2]·ClO4 unit extends its structure to form the 1D polymer 1 through hydrogen bonding interactions among pre-organized N–H groups of the cobalt(III) macrocycle, azide ligands, and perchlorate anions.