Thermochemical
study of the solid complex Ho(PDC)3 (o-phen) |
| |
Authors: | G Xie S P Chen S L Gao X X Meng Q Z Shi |
| |
Institution: | (1) Department of Chemistry, Shaanxi key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi ’an Shaanxi , P. R. China, 710069 |
| |
Abstract: | A novel solid complex, formulated as Ho(PDC)3
(o-phen), has been obtained from the reaction
of hydrate holmium chloride, ammonium pyrrolidinedithiocarbamate (APDC) and
1,10-phenanthroline (o-phen·H2O)
in absolute ethanol, which was characterized by elemental analysis, TG-DTG
and IR spectrum. The enthalpy change of the reaction of complex formation
from a solution of the reagents, ΔrHmθ (sol), and the molar heat capacity of the complex, cm,
were determined as being –19.161±0.051 kJ mol–1
and 79.264±1.218 J mol–1 K–1
at 298.15 K by using an RD-496 III heat conduction microcalorimeter. The enthalpy
change of complex formation from the reaction of the reagents in the solid
phase, ΔrHmθ(s), was calculated as
being (23.981±0.339) kJ mol–1 on the
basis of an appropriate thermochemical cycle and other auxiliary thermodynamic
data. The thermodynamics of reaction of formation of the complex was investigated
by the reaction in solution at the temperature range of 292.15–301.15
K. The constant-volume combustion energy of the complex, ΔcU, was determined as being –16788.46±7.74
kJ mol–1 by an RBC-II type rotating-bomb
calorimeter at 298.15 K. Its standard enthalpy of combustion, ΔcHmθ, and standard enthalpy of formation,
ΔfHmθ, were calculated to be –16803.95±7.74 and –1115.42±8.94
kJ mol–1, respectively. |
| |
Keywords: | ammonium pyrrolidinedithiocarbamate (APDC) hydrate holmium chloride 1 10-phenanthroline (o-phen·H2O) thermochemistry |
本文献已被 SpringerLink 等数据库收录! |
|