Chinese Journal of Organic Chemistry ›› 2004, Vol. 24 ›› Issue (11): 1417-1422. Previous Articles     Next Articles

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

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