Two zinc(II) complexes with dimethyl 2,2′-bipyridine-4,5-dicarboxylate (py-2py) of the general formula [Zn(py-2py)X2], X = Cl− (1) and Br− (2) were synthesized characterized by NMR, IR UV-Vis spectroscopy single-crystal X-ray diffraction analysis. Complexes 1 2 are isostructural adopt a slightly distorted tetrahedral geometry values indices τ4 τ’4 in range 0.80–0.85. The evaluated for their vit...