Thermochemistry of hexafluoro-anions of M IV (M = Si, Ti, Mn, or Re) and lattice energy calculations for their salts
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 3,p. 726-733
- https://doi.org/10.1039/dt9810000726
Abstract
Enthalpies of solution of salts of MF6 2–(M = SiIV, TiIV, MnIV, or ReIV), reactions of anions of this type for M = OsIV, RuIV, and ReIV, and enthalpies of hydrolysis of hexafluoro-manganate(IV) and -rhenate(IV) ions are reported. From these results and appropriate ancillary thermochemical data and extra-thermodynamic assumptions, we have estimated ion hydration enthalpies for a range of MF6 2– ions, enthalpies of formation of K2[MnF6], Rb2[MnF6], K2[ReF6], and several MF6 2– ions, and two-fluoride ion affinities of the tetrafluorides of silicon, titanium, and manganese. The lattice enthalpies required in deriving these estimates have been obtained by an empirical and by a direct minimisation approach.Keywords
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