Am. Alajlouni et Es. Gould, ELECTRON-TRANSFER - 137 - FORMAL POTENTIALS INVOLVING INDIUM(II), Research of chemical intermediates, 24(6), 1998, pp. 653-656
Aqueous solutions of indium(III) undergo le(-) reductions by Sm(II) (E
-0 -1.55 V) and by Yb(II) (-1.05 V), but not by U(III) (- 0.52 V). The
facile and irreversible reduction, by In-aq(+), of Ru(NH3)(6)(3+) (E-
0 +0.067 V) at reagent concentrations near 10(-3) M implies a potentia
l more negative than -0.23 V for In(II,I) and, in conjunction with the
known value of -0.43 V for In(III,I), a complementary potential less
negative than -0.65 V for In(III,II). These observations, taken togeth
er, support le(-) indium potentials E-II,I(0) -0.2 V and E- III,II(0)
-0.6 V.