{[Co(mu-bpe)(bpe)(2)(H2O)(2)](0.5bpe)(H2O)(ClO4)(2)}n: a transition metal-organo network with a novel supramolecular architecture (bpe = 1,2-bis(4-pyridyl)ethane)

The crystallographic study of {[Co(mu-bpe)bpe)(2)(H2O)(2)](0.5bpe)H2O)(ClO4 )(2)}(n), 1, revealed a complex three-dimensional structure based on simult aneous coordinative and hydrogen-bond interactions. The 1,2-bis(4-pyridyl)e thane molecules exhibit two different conformations (antiperiplanar and gau che) and different functions (bridging and terminal ligand, and non-coordin ated). One bpe molecule acts as a bridging ligand and affords linear chains , which are further cross-linked by hydrogen-bond bridges involving the two terminal bpe molecules. It results in a 3D network, with large channels oc cupied by hydrated, uncoordinated bpe molecules. (C) 1998 Elsevier Science Ltd. All rights reserved.