Table 3.

Standard potentials (E_1/2) vs. ferrocene (Fc, 2 mM) of the complexes (1 mM) in DCM, ACN, DMSO, and DMF.

Compound	Standard Potentials (E1/2) vs. Fc in
	DCM	ACN	DMSO	DMF
1	−729 mV	−680 mV	−728 mV	−729 mV
2	−502 mV	−392 mV	−723 mV	n.d.
3	−572 mV	−515 mV	−724 mV	n.d.
4	−873 mV	−819 mV	−730/−1373 * mV	−1374 * mV
5	−660 mV	−665 mV	−722 mV	n.d.
6	−661 mV	−665 mV	−726 mV	n.d.
7	−1427 mV	−1376 mV	−724/−1403 mV	−1443 mV

* peak potential of the reduction signal (no reversible signal); n.d. (not determined).