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Citation: Lin Hua-Kuan, Lu Xiang-Sheng, Gu Zong-Xin, Li Wei-Hong, Chen Rong-Ti. Calorimetric Study of Ni(II), Co(II), Zn(II)-N-(para-cubstitutd Pheny1) Iminodiacetic Acid[J]. Acta Physico-Chimica Sinica, ;1994, 10(03): 212-216. doi: 10.3866/PKU.WHXB19940305 shu

Calorimetric Study of Ni(II), Co(II), Zn(II)-N-(para-cubstitutd Pheny1) Iminodiacetic Acid

1.
Department of Chemistry, Nankai University, Tianjin 300071

Received Date: 12 August 1992
Available Online: 15 March 1994

The formation heats of binary complex compounds formed from N-(para substituted phenyl) iminodiacetic acid (p-RPhIDA) with Ni(Ⅱ), Co(Ⅱ) and Zn(Ⅱ) have been determined by means of a model RD-1 conduction automatic calorimeter at 25.0±0.2 ℃ in the presence of KNO_3 (0.1 mol·L~(-1)). It was found that linear enthalpy relation ships not only did exist between the formation heats of the binary complex compounds (Ni(Ⅱ )-, Co(Ⅱ)-, Zn(Ⅱ)-p-RPhIDA) and the protonation heats of p-RPhIDA but the order of maghitude of these formation heats is in agreement with Irving-Willams order for the metal ions. The experimental fact of positive (endothermic) protonation heats of p-RPhIDA has been explained by means of polyring hydration structure of N-(para-substituted phenyl) iminodiacetate.
- LER,
- Polyring structure of hydration,
- Hydrogen bonding
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