The design and development of rational synthetic route to materials with desired properties remains to be a challenge in materials science. Along this line, the great interest has focused on the novel transition metal coordination polymers using oxalate and N-donor chelating and bridging ligand system, which may have application as molecular based magnetic materials [1,2]. The interaction of CuCl2 ·2H2O with aromatic N-donor ligand 2,3-bis(2-pyridyl)-pyrazine (dpp), and oxalic acid (H2ox), results in {[Cu4(dpp)2(ox)Cl6]}n one-dimensional chain polymer, which incorporates two symmetry independent metal centers and three different bridging ligands. The compound crystallizes in triclinic space group P-1: a=8.8654(7), b=10.4475(12), c=10.6091(9) Å, α=61.071(10), β= 77.982(7), γ=83.395(8)°. The dpp ligand chelates two symmetry independent metals. The square-pyramidal N2O2Cl surrounding of Cu1 is completed by two oxygen atoms from oxalate bridging ligand, two nitrogen atoms of chelating dpp ligand and terminal chlorine in the apex of pyramid, while square-pyramidal N2Cl3 coordination of Cu2 is accomplished by two bridging and one terminal chlorine atoms, with one of the bridging Cl in the vertex, Fig.1. The centrosymmetric oxalate di-anion bridges two symmetry related Cu1 atoms, while two mono μ- chloro ligands bridge the inversion center related Cu2 atoms. There are three different intrachain Cu···Cu separations, namely 6.719(1) Å through dpp ligand, 5.173(1) Å for Cu1-ox-Cu1, and the shortest one 3.252(1) Å through double chlorine bridge. The Cu2-Cl3-Cu2 bridging angle is 83.9(1)º. In the crystal parallel chains run along [102] direction.