Single crystals of CuCl 2 -triazole were synthesized. XRD revealed the one-dimensional structure composed of an array of copper atoms bridged via chlorine and triazole. The magnetization data suggested the Ising spin structure and the presence of antiferromagnetic coupling between the neighbouring Cu(II) ions. DFT calculations estimated the magnetic anisotropy based on which the spin structure that explain the observed magnetic properties was suggested. This work provides the means to evaluate the magnetic properties of a coordination polymer, which provide the foundation for more elaborated works using advanced techniques such as ineleastic neutron scattering.