Synthesis, crystal structure and magnetic properties of a one-dimensional copper(II) polymer bridged by different double end-on azide bridges

A one-dimensional (1D) copper(II) complex [Cu3(μ1,1-N3)6(dmp)2]n (1) has been synthesized and structurally characterized. The molecular structure of 1 is constructed by trimeric [Cu3(μ1,1-N3)6(dmp)2] units formed through two double symmetric (basal-to-basal) end-on (EO) azide bridges and the trimeric units are connected further by double asymmetric (basal-to-apical) EO azide bridges, giving 1D chain-like structure. The chains of 1 are linked together by N–H⋯Nazide hydrogen bonds and very weak Cu⋯Nazide coordination interactions from μ-1,1,3,3-N3 fashion to form two-dimensional (2D) supramolecular architecture. The magnetic structure can be considered as uniform 1D chain formed by linear trimeric CuII–CuII–CuII units and the dominating magnetic coupling occurs within the trimeric Cu 3 II unit. The magnetic study shows that the compound exhibits ferromagnetic interactions with Jt = + 8.36(2) cm−1 and Jc = + 0.35(4) cm−1 for intratrimeric and intertrimeric Cu 3 II unit based on 1D magnetic model, respectively.