The surface of nanometer calcium carbonate powder was modified with stearic acid.It is showed from active exponent analysis that surface energy and polarity of the modified nanometer calcium carbonate are decreased.IR analysis shows that the steatic acid is attached to calcium carbonate by chemical bond.
The Cu（Ⅱ）complexes of 2-aminopyrimidine were synthesized and characterized by elemental analyses,TG-DTG.The dissolution enthalpies of the[AP（s）+CuCl2·2H2O（s）]and Cu（AP） Cl2（s）in 100.00 mL 2 mol.L-1HCl solution were measured at 298.15 K by classical solution calorimetry.The standard molar reaction enthalpy of the coondination reaction of 2-aminopyrimidine with Cu（Ⅱ）has been determined by a thermochemical cycle(ΔrH○-m=-1.92±0.27kJ·mol-1).From the result,the standard molar enthalpy of formation ΔfH○-m[Cu（AP）Cl2,s,298.15K] of Cu（AP）Cl2 has been calculated to be-297.46±1.72kJ·mol-1.
