84
4 Technetium Coordinated by Organic Ligands …
Table 4.3
(continued)
[Tc H(N2)(dppe)2]
[Tc H(CN-tert-buthyl)(dppe)2]
[Tc H(CNC6H11)(dppe)2]
0.31
0.23
0.22
0.2 M TBABF4 in THF
(N2) ligands, quasirev. process for
(CN-tert-buthyl)
and(CNC6H11)
ligands
[Tc(NO)(CNCMe3)5]
2+
[Tc(CNCMe3)6]
+
II/I
I/0
-0.72
0.83
TBAP in ACN
E vs. SCE;
quasirev. oxidation;
irrev. reduction
(Linder 1986)
[Tc(NO)(CF3COO)4F]
2II/I
0.744V
CF3COOH
(Balasekaran 2017)
Tc(PnAO)
(ligand: PnAO-l-(2-nitroimidazole)
V/IV
1.99
-1.52
0.1 M TBABF4 or TBAPF6
in DMF
E vs. Ag,Ag
+
in ACN;
irrev.
process
(Linder 1994)
TcBr2(PMe2Ph)2bpy]
+
TcCl2(PEt2Ph)2bpy]
+
TcCl2(PMe2Ph)2bpy]
+
TcCl2(PMe2Ph)2phen]
+
TcCl2(PMe2Ph)2Me2bpy]
+
TcCl(PEtPh2)2terpy]
+
TcBr(PMe2Ph)2terpy]
+
TcCl(PMe2Ph)2terpy]
+
IV/III;
III/II;
II/I
1.044;
0.049;
1.080;
0.077;
1.033;
0.128;
1.039;
0.130;
0.965;
0.189;
0.491; 1.072
0.467; 1.067
0.440; 1.123
0.1 M TEAP in ACN
E vs. SCE;
(Wilcox 1991)
Complex
Oxidation states
and E1/2
(or E
0’
) / V
Medium
Remarks
Reference
[Tc H(CO)(dppe)2]
II/I
0.59
E vs. NHE;
Ep/2 ox.; irrev. process
for Tc complexes with (CO) and
(Wang 1993)
E vs. Fc,Fc +
;
peak separation: 125 mV
(continued)