The synthesis and crystal structures of ‘necklace’ 1-D coordination polymers with Cu2I2 nodes and ‘extended-reach’ heterocyclic bridging ligands

•Extended reach ligands with CuI consistently give 1-D necklace polymers.•Large macrocyclic rings with Cu2I2 nodes.•No interpenetration observed.•One ligand is hypodentate.

Reaction of three ‘extended-reach’ bridging ligands with copper(I) iodide consistently produced 1-D coordination polymers with a necklace-type connectivity. These all consist of large macrocyclic rings sharing Cu2I2 nodes. In one case a potentially tripodal ligand acts in a hypodentate mode, with a pendent non-coordinated arm inserted into the cavity of an adjacent macrocycle.

Graphical abstractReaction of three ‘extended-reach’ bridging ligands with copper(I) iodide consistently produces 1-D necklace coordination polymers having large macrocyclic rings that share Cu2I2 nodes.Figure optionsDownload full-size imageDownload as PowerPoint slide