Thermochemistry of fluorine compounds. Part II. The hexafluoroiodate series
Abstract
From measurements of the heats of aqueous alkaline hydrolysis in 0·1 M-NaOH at 25 °C the standard enthalpies of formation of the following hexafluoroiodates are derived: ΔHf°[KIF6, cryst.]298=–1492 ± 2·5 kJ mol–1(–356·5 ± 0·6 kcal mol–1); ΔHf°[RbIF6, cryst.]298=–1473 ± 2 kJ mol–1(–352·1 ± 0·5 kcal mol–1); and ΔHf°[CsIF6, cryst.]298=–1466 ±2 kJ mol–1(–350·4 ± 0·5 kcal mol–1). Estimates of lattice energies and of ΔHf[IF6–, g]298 are reported.