]. Gao et al. [ 10 ] have investigated the phase chemistry of the coordination behavior of zinc salts with l -α-methionine by the method of semi-micro phase equilibrium. The corresponding equilibrium phase diagram and refractive index diagram have been
Authors:J. Liu, Y. Hou, S. Gao, M. Ji, R. Hu, and Q. Shi
The eight solid complexes of zinc with L--methionine or L--histidine were prepared. The thermal decomposition processes of these complexes were determined by means of TG-DTG. The results show that their decomposition processes can be divided into three steps except for the complex Zn(Met)2 the decomposition of which is completed in one step. All the final products are ZnO.
The enthalpies of solution in water of L--methionine and its zinc complexes Zn(Met)Cl2, Zn(Met)2Cl2·2H2O, Zn(Met)(NO3)2·1/2H2O, Zn(Met)3(NO3)2·H2O and Zn(Met)SO4·H2O have been measured at 298.15 K. The standard enthalpy of formation of met(aq) has been calculated. The experimental results have been discussed.