The pale blue powder of copper Lthreonac was obtained by extracting with alcohol in the concentrated solution derived from the reaction between Lthreonate acid solution prepared by double decomposition reaction of calcium Lthreonate with oxalic acid and superfluous copper dihydrocarbonate at 80℃ and 30 min.The composition of the new compound was determined by chemical and elemental analyses and its formula fits Cu(C4H6O5)·05H2O.The IR spectra indicated that Cu2+ in the compound coordinates to oxygen atom of the carboxyl group pentaring and oxygen atom of hydroxy group of ethanol attached to carboxyl group forming,while the proton of the carboxyl group is dissociated.The results of TG-DTG show that the compound has fairish stability,the intermediate and final product of the thermal decomposition of the compound are Cu(C4H6O5) and CuO ,respectively.The constant volume combustion energy of the compound,ΔcE,it is (-16165±072)kJ·mol-1,was determined by a precise rotatingbomb calorimeter at 29815K,and its standard enthalpy of combustion,ΔcHθm,and standard enthalpy of formation,ΔfHθm,were calculated.They are(-161491±072)kJ·mol-1and (-111476±081)kJ·mol-1,respectively.
The complexes of zinc chloride and zinc nitrate with 2 amino 4,6 dimethyl pyrimidine (ADMP) were prepared through reflux in alcohol. The compositions of the complexes Zn(ADMP)2Cl2 (b) and Zn(ADMP)2(NO3)2·4H2O (c) were determined 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, ΔcE, were determined by a precise rotating bomb calorimeter at 298.15K. They were (-3664.53±1.18)kJ·mol-1, (-7130.94±3.69)kJ·mol-1, and (-7637.87±5.71)kJ·mol-1. Their standard enthalpies of combustion,, and standard enthalpies of formation, , were calculated. They were (-3666.39±1.18)kJ·mol-1, (-7129.70±3.69)kJ·mol-1, (-7632.91 ±5.71)kJ·mol-1 and (19.09±1.43)kJ·mol-1, (-411.96±4.03)kJ·mol-1, (-1153.28±6.02)kJ·mol-1.
