STANDARD ENTHALPY OF FORMATION OF DICHLOROIODINE(III) TETRACHLOROALUMINIUM(III), [ICL2(-)] AND THE THERMOCHEMISTRY AND ENERGETICS OF THE GASEOUS DICHLOROIODINE(III) CATION, [ICL2(+)]()][ALCL4()

The experimental determination of the standard enthalpy of formation o f the crystalline salt [ICI2+][AlCl4-], is reported to be Delta(f)H(0) (IAlCl6,c)/kJ mol(-1) = -836.6 +/- 6.2 along with the total lattice po tential energy, U-POT(IAlCl6)/kJ mol(-1), calculated to be 562.5 +/- 5 .0 using the program LATEN. The standard enthalpy of formation of the [ICI2+] cation, Delta(f)H(0) ([ICI2+],g)/kJ mol(-1) is found to be 926 .9 +/- 9.0. The electron attachment enthalpies for the ICI2 (g) and [I CI2+] (g) species, are in kJ mol(-1) : 533.2 and -999, respectively. ( C) 1997 Elsevier Science Ltd.