Thermochemistry of polyhalides. Part 5. Standard enthalpies of formation of tetramethylammonium and tetraethylammonium tetrachloroiodates

Abstract

The standard enthalpies of formation of methyl- and ethyl-ammonium tetrachloroiodates NR_nH_4–nICl₄(R = Me or Et, 0 ⩽n⩽ 4), have been determined by a solution reaction method using aqueous silver nitrate. Lattice energies have been estimated from these data and trends in these and in the standard enthalpies of formation as a function of alkyl substitution are discussed.