A one-dimensional coordination polymer based on copper(II) nitrate and 1,2-bis(5-monomethylhydrazinyl-1H-tetrazolyl)ethane as ligand was prepared. The thermal and physical stability was determined by differential scanning calorimetry and BAM methods. The polymer was investigated by vibrational spectroscopy and single X-ray diffraction. Moreover, the ligand itself and the 1,2-bis(1H-tetrazolyl)ethane were characterized as energetic material by bomb calorimetric measurements along with calculations using the EXPLO5 software. Both compounds have moderate energetic properties along with a high thermal and physical stability. These findings render these compounds into promising environment friendly gas generating agents.