Now interest to polynitrogenous compounds still remains. In the given work complex perchlorate salts with tetrazolyl-1-acetohydrazide (TH-1) as ligand are investigated. Joint use of precision calorimetric methods of combustion and dissolution has allowed to receive thermochemical properties the indicated complex perchlorate salts of the common formula:[Me(TH-1)_2](CIO_4)_2, where Me = Ni, Zn, CdThe thermochemical cycle of reactions is developed for definition of a standard enthalpy of formation of complex salts. Energy of combustion ligand is measured on a precision combustion calorimeter, developed in Semenov Institute of Chemical Physics specially for combustion of energetic materials, that has allowed to get its standard enthalpy of formation. Dissolution enthalpies in 0,1N a solution of hydrochloric acid and in water of complex salts of transitive metals and a ligand are measured. On the basis of the received data enthalpies of formation of salts and an enthalpy of formation of three new complex ions with a new ligand are calculated.
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