Assembly of two supramolecular structures by metal complexes with a urea-based pyridyl ligand

The supramolecular structures of two metal complexes, [CuL4Cl2] (1) and [ZnL2Cl2] (2), where L = N-(2,6-dimethylphenyl)-N′-(3-pyridy1)urea, are reported. Complex 1 features infinite tapes formed by intermolecular N–H⋯Cl hydrogen bonds with an R21(6) motif, as well as a π–π stacking interaction. The solid-state structure of 2 shows a 2D network held together by two types of N–H⋯O R21(6) motifs, and there is no significant interaction between the NH groups and the metal-bound Cl− ions.

Graphical abstractThe syntheses and supramolecular structures of two metal complexes, [CuL4Cl2] (1) and [ZnL2Cl2] (2) (L = N-(2,6-dimethylphenyl)-N′-(3-pyridy1)urea) are reported. Complex 1 features infinite tapes, while 2 shows a 2D network, formed by R21(6) hydrogen bond motifs with either N–H⋯Cl (1) or N–H⋯O (2) contacts.Figure optionsDownload full-size imageDownload as PowerPoint slide