Synthesis and Structure of Polymeric Copper(I) Compound with Single-Stranded Dihelicate Units involving Multiring Nitrogen-Heterocyclic Ligand

Abstract

The polymeric copper(I) complex [Cu2(L)I2] (1) containing a new biologically relevant heterocyclic bis-bidentate ligand viz. 3,3′-dipyridine-2-yl-[1.1′]bi[imidazo[1,5-a]pyridineyl] (L) was synthesized and characterized by single-crystal X-ray diffraction analysis. The molecule lacks molecular center of symmetry where coordination environments around both Cu(1) and Cu(2) are distorted tetrahedral (Cu···Cu# separation of 3.5 Å). Compound in its solid-state structure shows π-π non-covalent interactions as well as Carene-H---anion non-classical hydrogen bonding interactions that play dominant roles in shaping the extended structure of the molecule.