关键词: 稳定性, 氨基, 铜络合物, 生成焓, 氯乙酸 P, 力学性质, 镍络合物, 酸碱平衡, 络合物化学, 生成熵

The stepwise formation constants of complex compounds formed from N-(m-substituted-phenyl) glycines (m-RC6H4NHCH2COOH(m-RPhG), R = H, CH3, CH3O, Cl, NO2) with Cu(II) and Ni(II) were determined by pH method at 15, 25 35`C in 30% (V/V) ethanol solution in the presence of 0.1m NaClO4. Their thermodynamical parameters were calculated. It was found that the N-(m-substituted-phenyl) glycine complexes also showed linear free energy relationships between the stability of complex compounds and the base strength of the ligands just as the para-substituted isomers reported previously. Linear relationships not only existed between their thermodynamical parameters and the base strength of the ligands but also existed between the formation enthalpy of complex compounds and the neutralization enthalpy of the ligands and between the formation entropy of complex compounds and neutralization entropy of the ligands as well.

Key words: STABILITY, AMINO GROUP, COPPER COMPLEX, ENTHALPY OF FORMATION, CHLOROACETIC ACID P, MECHANICAL PROPERTIES, NICKEL COMPLEX, ACID-BASE EQUILIBRIUM, COORDINATE CHEMISTRY, FORMATION ENTROPY