4: Thermochemical data (kJ mol
-1) for the first row Transition
Elements and the Standard Electrode Potentials for the
Reduction of M
II to M The stability of the half-filled d sub-shell in Mn
2+ and the completely
filled d
10 configuration in Zn
2+ are related to their E
o values, whereas E
o
for Ni is related to the highest negative DhydH
o An examination of the E
o(M
3+/M
2+) values (Table 4 2) shows the varying
trends