A linear piperazine-pyridine ligand and its Hg coordination polymer

Reaction of piperazine hexahydrate with 4-chloromethylpyridine hydrochlorid e affords a new piperazine-pyridine ligand: N,N'-bis(4-pyridylmethyl)pipera zine (bpmp). X-ray structure analysis confirms an overall linear structure, in which the lone electron pairs of piperazine-N are in trans-position, It s zigzag polymer with Hg2+ was readily obtained in THF. Bpmp is held in the chair conformation in the polymer, and Hg2+ coordinates to two N atoms fro m different bpmp ligands and two I atoms. (C) 2001 Published by Elsevier Sc ience B.V.