Coordination polymers, especially those porous, are a promising class of materials. Sulfate anions with rigid tetrahedral geometry are widely employed to prepare extended network structures similar to silicates, phosphates, arsenates etc. Due to the direct cation-anion coordination linkage the pathway to obtain neutral metallo-organic carcases is straighforward. Sulphates have been used in the synthesis of coordination polymers in particular openframework compounds and also heterometallic coordination polymers. The variety and diversity exhibited by this class of compounds has been reviewed by Rao et al. [1]. To increase and adjust the metal-metal distances, we used the bridging Schiff base ligands of the N,N-donor bis-monodentate type of the class of aromatic azines,1,2-bis(pyridin-4ylethylidene)hydrazine)(4-bpmhz) and 1,2-bis(pyridin-3-ylethylidene)hydra- zine) (3-bpmhz). Following the reaction between the CdSO4·8/3H2O salt and the mentioned lingands, two coordination polymers were obtained by the diffusion method, 2D coordination network[{Cd(4bpmhz)(SO4)(H2O)}]n (1) and the 3D coordination grid, [Cd(3-bpmhz)(SO4)(H2O)]n(2) whose crystal structures were confirmed by single-crystal X-ray diffraction analysis. Compounds 1 and 2 crystallize in the same monoclinic crystal system. For 1: a=29.8591(8), b=10.0210(3), c=6.8629(5) Å, b=96.429(4)^o, V=2040.59 Å3sp. gr. C2. For 2: a=5.6884(2), b=10.5861(4), c=13.7576(5) Å, b=93.440(4)^o, V=826.96 Å3, sp. gr. P21. In 1 the sulfate anion is bidentate bridgingcoordinated to two cadmium cations; the metal’s N2O4 octahedral geometry is formed by two sulfate anions, two azine ligands, and two water molecules. In compound 2 the sulfate anion is tridentate-bridging coordinated to three cadmium cations; each Cd(II) center adopts again N2O4 octahedral coordination geometry with two nitrogen donors from two 3-bpmhz ligands, and four oxygen donors from three sulphate anions, and one water molecule, respectively.