4.2 Aqueous Solutions
87
Table 4.3
(continued)
[Tc(SOS)(S-p-C6H4-OMe)(PMe2Ph)]
[Tc(SSS)(S-p-C6H4-OMe)(PMe2Ph)]
[Tc(SN(Me)S)(S-p-C6H4OMe)(PMe2Ph)]
IV/III;
III/II
0.175
0.262
0.006
0.294;
0.468
0.200;
0.550
0.215;
0.565
0.144;
0.556
0.247;
0.568
0.262;
0.335
0.063;
0.520
0.1 M TBAP in DCM
E vs. Fc,Fc
+
; oxidation of Tc(III) is
irrev. except for Tc-(SN(Me)S)
complex which is quasi-rev.
potential of anodic peak
(Pietzsch 2001, 2003)
III/II;
II/I
0.312;
0.517
0.307;
0.544
0.298;
0.542
0.113;
1.31
0.5 M TEAP in DMF
E vs. Ag,AgCl (3 M NaCl);
irrev. at 25
0
C;
(Okamoto 1993,
1993a)
Complex
Oxidation states
and
E1/2
(or
E
0’
) / V
Medium
Remarks
Reference
[Tc(dmdc)(dppbt)2]
+
[Tc(dedc)(depe)2]
+
[Tc(pmdc)(depe)2]
+
trans[Tc(SCP)
2 (dmpe)3]
3+
[Tc(SSS)(PPh2S)]
[Tc(SSS)(PCy2S)]
[Tc(SSS)(PMe2S)]
[Tc(SNS)(PPh2S)]
[Tc(SNS)(PMe2S)]
[Tc(SSS)(P(Me2Ph/S)
2 S)(SR)]
(“3+1+1” complex
1)
[Tc(SNS)(P(Me2Ph/S)
2 S)(SR)]
(“3+1+1” complex 2)
(continued)