Novel M(II)¯Hg(II) coordination polymers generated from metal-containing building blocks M(2-pyrazinecarboxylate)2·(H2O)2 (M=Cu, Ni, Co) and HgCl2,

X-ray powder diffraction data are reported for a series of multipyrazole compounds in this paper. This work shows that the unit cell dimensions determined by single crystal agree well with those of powder diffraction analysis.