The dissociation energies of gaseous SmLi, EuLi, TmLi and YbLi

Abstract

The Knudsen-cell mass-spectrometric method has been used to study reactions of the type: M(g)+Li(g) = MLi(g) and M(g)+Li2(g) = MLi(g)+Li(g), where M = Sm, Eu, Tm or Yb. The dissociation energies (in kJ mol−1) of the gaseous lithide molecules determined from the measured reaction enthalpies are: Do0(SmLi) = 45.3±4.5. Do0(EuLi) = 63.2±3.0. Do0(TmLi) = 65.1±3.5 and Do0(YbLi) = 33.4±3.0.