Application of rotate-bomb calorimeter for determining the standard molar enthalpy of formation of Ln(Pdc)3(Phen) |
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Authors: | S P Chen S L Gao X W Yang Q Z Shi |
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Institution: | (1) Department of Chemistry, Shaanhi Key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi’an, 710069, China |
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Abstract: | Thirteen solid ternary complexes Ln(Pdc)3(Phen) (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu;) have been synthesized in absolute ethanol by rare-earth
element chloride low hydrate reacting with the mixed ligands of ammonium pyrrolidinedithiocarbamate (APdc) and 1,10-phenanthroline
· H2O (o-Phen · H2O) in the ordinary laboratory atmosphere without any cautions against moisture or air sensitivity. IR spectra of the complexes
showed that the Ln3+ ion was coordinated with six sulfur atoms of three Pdc− and two nitrogen atoms of o-Phen · H2O. It was assumed that the coordination number of Ln3+ is eight. The constant-volume combustion energies of the complexes, Δc
U, were determined by a precise rotate-bomb calorimeter at 298.15 K. Their standard molar enthalpies of combustion, Δc
H
m
o
, and standard molar enthalpies of formation, Δf
H
m
o
were calculated.
The text was submitted by the authors in English. |
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