90
4 Technetium Coordinated by Organic Ligands …
Table 4.3
(continued)
Tc2Cl4(PMe3)4
Tc2Br4(PMe3)4
0.894;
0.335;
0.984;
0.201;
E vs. Fc,Fc
+
;
(Poineau 2010)
[(TCTA)Tc(μ-O)2Tc(TCTA)]
2IV-IV/IV-III;
0.167
HOAc/NaOAc
(pH
3-6);
KH2PO4/K2HPO4 (pH 5-8);
Tris-HCl/Tris (pH 7.5-9.5).
E vs. SCE; except reported also 2
other redox couples
(Linder 1989)
[Tc2(CH3CN)10]
4+
[TcCl2(CH3CN)4]
+
III/II;
II-II/II-I
0.82;
1.96
0.62;
1.96
0.1 M TBABF4 in ACN
E vs. Fc,Fc
+
;
potential of cathodic
peak of irrev. process; for
[TcCl2(CH3CN)4]
+
quasi-rev.
proces at Epa
= 1.24
V
(Bryan 1995)
[Tc2Cl4(PMe2Ph)4]
+
[Tc2Cl5(PMe2Ph)3]
Tc2(DPhF)3Cl2
Tc2(DPhF)4Cl
III-III/III-II III-II/II-II
0.92;
0.26
0.53;
0.74
0.2;
1.5
0.46;
1.73
0.1 M TBABF4
in ACN
0.1 M TBAPF6 in DCM
E vs. Fc,Fc
+
;
(Cotton 1996, 1996a)
[Tc2(μ,K
1
,K
2
-CH CN)(CH3
3
CN)10]
3+
II-II/II-I
II-I/I-I;
0.25;
1.12
0.1 M TBABF4 in ACN
E vs. Fc,Fc
+
;
(Cotton 1997)
III-III/III-II
III-II/II-II
Complex
Oxidation states
and E1/2
(or E
0’
) / V
Medium
Remarks
Reference
0.2 M TBABF
4 in DCM
(continued)