Synthesis and crystal structure of a new polymer built from a cyano nickel(II) oxa-azamacrocyclic complex

Abstract

The nickel(II) polymeric complex {[Ni 6([22]-HMTADO) 3(CN) 4][Ni(CN) 4] · 5H 2O · 8CH 3OH} n ( III), where H 2[22]-HMTADO = 5,5,11,17,17,23-hexamethyl-3,7,15,19- tetraazatricyclo[19,3,1,1 9,13] hexacosa-1(25),2,7,9,11,13(26),14,19,21,23-decane-25,26-diol, is obtained from methanolic solution of [Ni 2([22]-HMTADO)(CN) 2] · 0.5H 2O ( II) by slow evaporation method and characterized by X-ray crystal structure determination. The nickel(II) centers in the oxa-azamacrocyclic complex are bridged by the two phenolate oxygens as well as by CN − and coordinated to carbon and nitrogen atoms derived from the bridging cyano ligand, forming square pyramidal and octahedral geometries, respectively. The mean nonbonded Ni⋯Ni intermetallic separation in the polymeric complex is 3.159 Å.