Coordination Polymers Constructed from alkoxo-bridged nodes and exo-bidentate Ligands

Three new coordination polymers have been obtained by using alkoxo-bridged copper(II) complexes as nodes, and exo-bidentate ligands as spacers (bis(4-pyridyl)ethane, bpeta, bis(4-pyridyl)propane, bpp, and pyrazine, pyr): [Cu2(pa)2(C2H5OH)2(bpeta)](BF4)2 1; [Cu4(pa)4(bpp)4(ClO4)2](ClO4)2·2H2O 2; [Cu2(mea)2(pyr)2](CF3SO3)2 3 (pa stands for the anion of propanolamine, and mea for the one of monoethanolamine). The crystallographic investigation of the three compounds reveals one-dimensional coordination polymers in 1 and 2, and grid-like layers in 3.