1D Cu(II) coordination polymer derived from 2-(2-(2,4-dioxopentan-3-ylidene) hydrazinyl)benzenesulfonate chelator and pyrazine spacer

摘要

Reaction of 2-(2-(2,4-dioxopentan-3-ylidene)hydrazinyl)benzenesulfonic acid (H_2L) with copper(II) nitrate hydrate in the presence of pyrazine (pz) in methanol affords the coordination polymer [Cu_2(l-L)_2(H_2O)_2(l-pz)]n (1), where the bidentate pz molecule links two Cu(II) centres of two different dimeric units, giving rise to a one-dimensional chain. The dimeric unit [Cu_2(l-L)_2(H_2O)_2] consists of two distorted octahedral Cu(II) centres connected via oxygen atoms of the sulfo group of the bridging L~(2-) ligand. The extensive hydrogen bonding between the coordinated water and pz molecules leads to the formation of a supramolecular 3D associate. Compound 1 has been characterized by elemental analysis, ESI-MS, IR spectroscopy and single-crystal X-ray diffraction analysis.