Standard energies of combustion and standard enthalpies of formation for the complexes RE (Et_2dtc)_3(phen) (RE = Ho,Er,Tm,Yb,Lu)

摘要

The treatment of RECl3?xH2O (RE = Ho, Er, Tm, Yb, Lu; x = 3-4) with sodium diethyldithiocarbamate (NaEt2dtc?3H2O) and 1,10-phenanthroline hydrate (o-phen?H2O) in absolute ethanol yielded five ternary solid complexes RE(Et2dtc)3(phen). IR spectra of the complexes showed that RE3+ coordinated to two sulfur atoms in NaEt2dtc and two ni- trogen atoms in o-phen. The constant-volume energies of combustion of the complexes have been determined by a precise rotating-bomb calorimeter at 298.15 K. The standard enthalpies of combustion and standard enthalpies of formation were calculated.