Syntheses and Characterization of ZnII and CdII Coordination Polymers, [Zn(μ-bpe)(NO2)2]n and [Cd2(μ-bpp)3(NO2)4]n

Abstract

Two new ZnII and CdII coordination polymers of trans-1,2-bis(4-pyridyl)ethene (bpe) and 1,3-di(4-pyridyl)propane (bpp) with anionic nitrite ligands, [Zn(μ-bpe)(NO<inf>2</inf>)<inf>2</inf>]<inf>n</inf> (1) and [Cd<inf>2</inf>(μ-bpp)<inf>3</inf>(NO<inf>2</inf>)<inf>4</inf>]<inf>n</inf> (2) have been synthesized and characterized by elemental analysis, IR-, 1H NMR- and 13C NMR spectroscopy and studied by X-ray crystallography. The structural studies of (1) and (2) show the compounds are one- and three-dimensional polymers with coordination environments of distorted octahedral and pentagonal bipyramide, ZnN<inf>2</inf>O<inf>4</inf> and CdN<inf>3</inf>O<inf>4</inf>, respectively. Self-assembly of these compounds in the solid state via π-π-stacking interactions is discussed. © 2006 Elsevier SAS. All rights reserved.