Application of rotate-bomb calorimeter for determining the standard molar enthalpy of formation of Ln(Pdc)(3)(Phen)

作者：Chen S P^*; Gao S L; Yang X W; Shi Q Z

来源：Russian Journal of Coordination Chemistry, 2007, 33(3): 222-229.

DOI：10.1134/S1070328407030116

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 center dot H2O (o-Phen center dot H2O) in the ordinary laboratory atmosphere without any cautions against moisture or air sensitivity. IR spectra of the complexes showed that the Ln(3+) ion was coordinated with six sulfur atoms of three Pdc(-) and two nitrogen atoms of o-Phen center dot H2O. It was assumed that the coordination number of Ln(3+) is eight. The constant-volume combustion energies of the complexes, Delta U-c, were determined by a precise rotate-bomb calorimeter at 298.15 K. Their standard molar enthalpies of combustion, Delta H-c(m)o, and standard molar enthalpies of formation, Delta H-f(m)o were calculated.

• 出版日期2007-3
• 单位西北大学