Thermochemieal Study of Gaseous Salts of Oxygen-containing Acids:XXIV.Polymers of Alkali Metals Perrenates

摘要

The vaporization of alkali metals perrhenates was studied.Standard enthalpies of formation of the gaseous molecules(MReO4)2 were determined.The present work is a confirmation of the systematic study of the polymerization of gaseous salts of oxygen-containing acids.Vaporization of alkali metals perrhenates was studied in[2-5].These compounds pass in vapor without decom-position on heating(a negligible dissociation is observed only for lithium perrhenate)mainly as monomers and to a lesser degree as dimeric molecules.The vaporization enthalpies of alkali metals perrhenates in the form of monomers and dimers are presented in Table 1.