3, 6-di(2-pyridyl)-1, 2, 4, 5-tetrazine (DPTZ) and 4, 4’-oxybisbenzoic acid (H₂OBA) were used as mixed ligands to react with Co(II) ions and Cd(II) ions under solvothermal conditions, resulting in the formation of the complexes [Co(OBA)(DPTZ)]·(DMF)_0.5 (1) and [Cd(OBA)(DPTZ)]·(DMF)_1.5 (2). The structural characterization and analysis of the complexes were conducted through single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, and thermogravimetric analysis. Crystallographic data reveals that complexes 1 and 2 are isostructural, belonging to the monoclinic system with the space group of P2₁/c with each asymmetric unit consisting of one metal ion (Co/Cd), one 3, 6-di(2-pyridyl)-1, 2, 4, 5-tetrazine ligand and one 4, 4’-oxybisbenzoic acid ligand. The central metal ion (Co/Cd) has a distorted octahedral configuration, and two adjacent metal ions (Co/Cd) are connected by carboxylic acid ligands, forming a dinuclear pinwheel secondary structural unit. The dinuclear pinwheel secondary structural units are connected by OBA and DPTZ ligands, resulting in an infinitely extended 2D wave-like layer. The existence of the V-shaped ligand OBA as a flexible component within the structure gives rise to both left-handed and right-handed helical chains and helical channels. Furthermore, the magnetic measurement result shows that intramolecular antiferromagnetic interaction is observed in complex 1.