In 2 extended chains of copper ions are linked by double-bridging pyzdcH-groups while 3,4, and 5 have structures in which pyzdc2-ligands bridge metal centers to form extended linear chains. Magnetic susceptibility studies reveal antiferromagnetic interactions in 1,2,3,4, and 6 (6 is Cu(pyzdc)). The magnitude of exchange (-zJ = 0.033 cm-I for 1 and -J = O.l1,0.74,0.049, and 1.14 cm-' for 2,3,4, and 6, respectively) is discussed in terms of the structures and d-electron configurations involved.Key words: metal 2,3-pyrazinedicarboxylates, synthesis, X-ray structure, antiferromagnetism. Mors c l b : pyrazine-2.3-dicarboxylates mCtalliques, synthbse, structure par diffraction des rayons X, antiferrornagnitisme.[Traduit par la rCdaction]