The hexanuclear title compound, [{Cu3(3-OCH3)(-C3H2ClN2)3}2(-C3H2ClN2)3(6-Cl)] or [Cu6(C3H2ClN2)9(CH3O)2Cl], crystallizes in the space group Pbcn, with individual molecules being located on a twofold rotation axis. The molecule adopts a trigonal prismatic shape, with two trinuclear units linked by three 4-chloropyrazolate ligand bridges by encapsulating a Cl- anion in a 6-coordination mode. In the crystal, individual molecules are stacked into rods parallel to [1-10] that are arranged in a pseudo-hexagonal packing. Cohesion between molecules is accomplished through weak C-HCl interactions.
