Ferro/antiferromagnetic interactions transmitted by double bridged carboxylate groups in 2D mixed-ligand transition metal coordination polymers

► Three 2D coordination polymers with mixed ligand have been synthesized. ► The complexes were structurally characterized by single crystal X-ray diffraction. ► Antiferromagnetic interactions in MnII complex (1). ► Interesting ferromagnetic interactions in CoII (2) and NiII (3) complexes.