物理化学学报 >> 1991, Vol. 7 >> Issue (01): 82-86.doi: 10.3866/PKU.WHXB19910113

研究论文 上一篇    下一篇

镍(II)同α-氨基酸及草酸根生成二元配合物的热力学及热化学研究所

林华宽; 周志芬; 古宗信; 陈荣悌   

  1. 南开大学化学系，天津 300071
  • 收稿日期:1989-10-12 修回日期:1990-06-02 发布日期:1991-02-15
  • 通讯作者: 林华宽

Thermodynamic and Calorimetric Study on the Formation of Binary Complex Compounds of Nickel(II) with some α-Amino Acids and Oxalate

Lin Hua-Kuan; Zhou Zhi-Fen; Gu Zong-Xin; Chen Rong-Ti   

  1. Department of Chemistry, Nankai University, Tianjin
  • Received:1989-10-12 Revised:1990-06-02 Published:1991-02-15
  • Contact: Lin Hua-Kuan

PDF

2715

赞

摘要： 在25.0±0.1 ℃及0.1 mol·dm~(-3)(KNO_3)的条件下应用pH法测定了镍(Ⅱ)与L-脯氨酸。L-缬氨酸,α-氨基异丁酸和草酸根生成二元配合物的稳定常数。并在相同条件下用量热法测定了这些二元配合物的生成热及草酸根的质子化热。对草酸根的质子化热的吸热机理进行了初步的理论探讨。

关键词: 镍(II), α-氨基酸, 草根酸, 量热法, 生成热, 质子化热

Abstract: The stability constants of binary complex compounds of nickel (Ⅱ) with Lproline, L-valine, α-aminoisobutyric acid and oxalate were determined at 25.0±0.1 ℃, Ⅰ=0.1 mol·dm~(-3) (KNO_3) by pH method. The heats of formation of these binary systems and the heat of protonation of oxalate were determined by calorimetry under the same conditions. The fact that the heat effect of protonation of oxalate was found to be endothermic can be interpreted on account of the existence of seven membered ring of oxalate formed in aqueous solution through hydrogen bonds with water molecule.

Key words: Nickel(II), α-aminoisobutyric acid, Calorimetry, Heat of formation, Heat of protonation