The rapid development in crystal engineering of metal-organic coordination polymers continues to create various solid state structures with new compositions and topologies, which manifest potential applications in host-guest chemistry, catalysis, ion exchange, magnetism, nonlinear optics, molecular recognition and separation. The assembly of these complexes strongly depends on the selection of both the metallic centers and the ligands. Compared to 4,4ʹ-bipyridine (bipy), the 4,4ʹ-diaminodiphenylmethane (dadpm) molecule forms the hydrogen bonds via terminal amino-groups and it is a good candidate as a ligand in supramolecular architecture [1,2]. Here we report the preparation, IR characterization and X-ray investigation of a new 2D coordination polymer {[Cd(bipy)2(H2O)2](ClO4)2(bipy)0.5(dadpm)·2C2H5OH}n using the exo-bidentate N,N-bipyridyl-based ligand such as rigid rod-like bipy and angular dadpm as a guest molecule (Figure). The reported compound was obtained as a result of the reaction between Cd(ClO4)2·4H2O, bipy and dadpm in C2H5OH solvent. The IR specta of the coordination compound and the pure ligands dadpm and bipy were measured and confirm the presence of organic ligands used in the synthesis. The absorption bands observed at 3450-3373 cm-1 are assigned to asymmetric and symmetric stretching vibrations ν(NH2), while deformation vibrations δ(NH) were registered at 1600 cm-1. The bands at 2826-2886 cm-1 are assigned to the νs(CH2) and νas(CH2) stretching vibrations. The C-N absorptions are found in the 1065, 1181 cm-1 regions. The compound crystallizes in the monoclinic space group P21/c: a = 11.7324(3), b = 11.7462(3), c = 32.5247(11) Å, β = 95.812(3)°, V = 4459.2(2) Å3. The Cd cation adopts a slightly distorted octahedral surrounding with the N4O2-set of donor atoms going from the four bipy ligands at equatorial positions and two water molecules at the apical positions. The Cd – N bond distances range from 2.326(5) to 2.357(5) Å and Cd – O distances are 2.323(4) and 2.376(5) Å. In the crystals the 2D coordination polymer layers are united by O−H···O and O−H···N and N−H···O hydrogen bonds through going between uncoordinated chlorine anions, bipy and dadpm molecules into 3D supramolecular net.