Gas phase ionic chemistry has become an essential element in our general un
derstanding of chemical reactivity. Obtaining experimental data and then ex
tracting information al,out the potential surfaces for ionic reactions in t
he gas phase has been critical in making the connections between gas phase
and solution, ionic chemistry. In this paper we discuss insights that have
been important in developing some of the methodologies that are currently u
sed in analyzing gas phase data. (C) 2000 Elsevier Science B.V.