Two‐Dimensional Sheets of Tetragonal Copper(II) Lattices: X‐Ray Crystal Structure and Magnetic Properties of [Cu(C₆O₄Cl₂)(C₄H₄N₂)]n

CuII chains linked by chloranilate dianions function as the warp and pyrazine ligands as the woof in a “woven” two-dimensional coordination polymer. A section of the title compound is shown below. This arrangment leads to weak antiferromagnetic interactions between the metal centers and a singlet ground state. An analogous coordination polymer can be constructed with methanol as a hydrogen-bond donor.