Abstract
Ionization values for the deprotonation of the methiodide salts
1
-
8
, which occurs in strongly basic DMSO/water mixtures containing 0.047 M base, are used to determine pK
a
values by the Bunnett-Olsen and Marziano-Cimino-Passerini techniques, which involve extrapolation to the purely aqueous state. The resulting values are compared with those obtained using the H
0
q
acidity function; agreement is good in most cases.