Abstract: The complexes of hydrous copper chloride and copper nitrate with 2-amino-4,6-dimethylpyrimidine(ADMP) were prepared via reflux in alcohol. The compositions of the complexes were identified as Cu(ADMP)₂CL₂·2H₂O(b) and Cu(ADMP)(NO₃)₂·H₂O(c) by chemical and elemental analyses. The complexes were characterized by IR, XPS, ¹H NMR and TG-DTG techniques. The constant-volume combustion energies of ADMP and the complexes, Δ_cE, were determined by a precise rotating-bomb calorimeter at 298.15 K. They were (-3664.53±1.18), (-4978.47±2.72) and (-1696.70±1.36) Kj/mol, respectively. Their standard enthalpies of combustion, Δ_cH⁰_m, and standard enthalpies of formation, Δ_fH⁰_m, were calculated to be (-3666.39±1.18), (-4977.23±2.72), (-1691.12±1.36) Kj/mol and (19.09±1.43), (-2041.80±3.29), (-2397.24±1.65) Kj/mol, respectively.

Key words: Copper salt, 2-Amino-4,6-dimethylpyrimidine, Standard enthalpy of combustion, Standard enthalpy of formation