有机化学 ›› 2004, Vol. 24 ›› Issue (11): 1417-1422. 上一篇    下一篇

研究论文

三元配合物Ho(Et2dtc)3(phen)的合成及其热化学性质

朱丽, 焦宝娟, 帅琪, 杨旭武, 高胜利*, 史启祯   

  1. 西北大学化学系 陕西省物理无机化学重点实验室 西安 710069
  • 收稿日期:2003-12-12 修回日期:2004-03-15 接受日期:2004-05-12 发布日期:2022-09-21
  • 通讯作者: * E-mail: gaoshli@nwu.edu.cn
  • 基金资助:
    国家自然科学基金(No. 20171036)、陕西省教育厅专项基金(No. 01JK229)和西北大学重点基金(No. 02NW02)资助项目.

Synthesis and Thermochemical Properties of the Ternary Complex Ho(Et2dtc)3(phen)

ZHU Li, JIAO bao-Juan, SHUAI Qi, YANG Xu-Wu, GAO Sheng-Li*, SHI Qi-Zhen   

  1. Department of Chemistry, Northwest University, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Xi'an 710069
  • Received:2003-12-12 Revised:2004-03-15 Accepted:2004-05-12 Published:2022-09-21

改进文献方法,以铜试剂(NaEt2dtc·3H2O)和邻菲咯啉(o-phen·H2O)与低水合氯化钬(HoCl3·3.58H2O)在无水乙醇中反应,制得三元固态配合物.化学分析和元素分析确定该配合物的组成为Ho(Et2dtc)3(phen). IR光谱表明配合物中Ho3+与3个NaEt2dtc中的6个硫原子双齿配位,同时与o-phen中的2个氮原子双齿配位,可推测其配位数为8.用微量热量计测定了298.15 K下液相生成反应的焓变ΔrHӨm(l),为(-14.697±0.0376) kJ·mol-1,通过合理的热化学循环计算了固相生成反应焓变ΔrHӨm(s),为(117.504±0.619) kJ·mol-1;改变反应温度,研究了配合物的液相生成反应的热力学性质.配合物的恒容燃烧能ΔcU用精密转动弹热量计测定为(-18687.64±8.22) kJ·mol-1,其标准燃烧焓ΔcHӨm和标准生成焓ΔfHӨm经计算分别为(-18706.85±8.22)和(-70.01±9.37) kJ·mol-1.

关键词: Ho(Et2dtc)3(phen), 合成, 微量量热法, 热动力学, 恒容燃烧能, 标准摩尔生成焓

The ternary solid complex has been synthesized withsodium diethyldithiocarbamate (NaEt2dtc), 1,10-phenanthroline (o-phen) and low hydrated holmium chloride in absolute ethanol by the improvement of the methods reported in reference. The title complex was identified as the general formula of Ho(Et2dtc)3(phen) by chemical and elemental analyses. IR spectrum of the complex showed that the Ho3+ is coordinated with six sulfur atomsof three NaEt2dtc and two nitrogen atoms of phen. It was assumed that the coordination number of Ho3+ is eight. The enthalpy change of liquid-phase reaction [ΔrHӨm(l)] was determined as (-14.697±0.0376) kJ·mol-1 at 298.15 K by a microcalorimeter, and the enthalpy change of the solid-phase reaction [ΔrHӨm(s)] was calculated as (117.504±0.619) kJ·mol-1 on the basis of a thermochemical cycle. The thermokinetics of formation reaction was studied at different temperature by liquid-phase reaction.The constant-volume combustion energy of the complex, ΔcU, was determined as (-18687.64±8.22) kJ·mol-1 by a precise rotating-bomb calorimeter at 298.15 K. Its standard combustion enthalpy, ΔcHӨm, and standard enthalpy of formation, ΔfHӨm, were calculated as (-18706.85±8.22) and (-70.01±9.37) kJ·mol-1, respectively.

Key words: Ho(Et2dtc)3(phen), synthesis, microcalorimeter, thermodynamic, constant-volume combustion energy, standard molar enthalpy of formation