An unusual zig-zag 1D copper(ii) coordination polymer displaying magnetic phase transitionElectronic supplementary information (ESI) available. CCDC 1565811. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7dt03539j

An unusual Cu( ii ) coordination polymer [Cu(Him) 2 (L)] ( 1 ) having a 4,4′-{[1,2-phenylene bis-(methylene)]bis(oxy)}dibenzoic acid ligand and an imidazole ligand possessing a 1D zig-zag chain was constructed and its magnetic behaviour was investigated, which indicated a magnetic phase transition below 25 K as well as long-range magnetic ordering. A new Cu( ii )-based 1D chain was prepared and its magnetic behaviour was investigated, which indicated a magnetic phase transition below 25 K as well as long-range magnetic ordering.