Tuning Reactivity of Platinum(II) Complexes

84% (34.7 mg, 0.0618 mmol). 1 H NMR (DMSO): 9.13 (s, 1H), 9.06 (s, 1H), 8.66/8.64 (dd,
2H), 8.48 (m, 2H), 8.17 (m, 2H), 7.93 (d, 1H), 7.80 (m, 1H), 8.80 (m, 1H), 7.95-7.51 (m,
5H), 2.50 (m, 3H, CH3). 195 Pt NMR (DMSO): -2661.76 ppm. Anal. Calcd: C, 37.2; H, 2.3; N,
5.0; Found: C, 37.4; H, 2.3; N, 5.2%.
3.2.1.6 Synthesis of 2,2´:6´,2˝-terpyridine Platinum(II) (PtCl) 29
Pt
[Pt(COD)Cl 2 ]
Cl
Cl
+
N
N
N
2,2'-terpyridine
Scheme 3.7: Synthesis of the complex PtCl
OH 2
40-50 o C
9
N
N
Pt
Cl
PtCl
N
Cl.2H 2 O
An aqueous solution of [Pt(COD)Cl2] (500 mg, 1.34 mmol) (30 ml) was added to
2,2´:6´,2˝-terpyridine (313 mg, 1.34 mmol) in a small amount of water. The mixture was
stirred for 15 minutes at 45-50 °C. The clear orange-red solution obtained was allowed
to cool down and any unreacted [Pt(COD)Cl2] filtered off. The solvent was evaporated
under reduced pressure. The orange-red solid, [Pt(terpy)Cl]Cl·2H2O, (PtCl) was washed
with diethyl ether, re-crystallized in a hot methanol/water mixture (50: 50), after which
the orange needle like crystals were washed with diethyl ether and air dried to give
analytically pure material of [Pt(terpy)Cl]Cl·2H2O (PtCl): Yield: 89% (0.64 g, 1.19
mmol). Anal. Calcd: C, 33.7; H, 2.8; N, 7.9; Found: C, 33.9; H, 2.8; N, 7.8%.
3.2.1.7 Synthesis of 4’–(2’’’–CH3–phenyl)–2,2’:6’,2’’–terpyridine ligand
The Synthesis of 4’-(2’’’-CH3-Ph)-2,2’:6’,2’’-terpyridine ligand (Scheme 3.8) as
described by Summerton and Field, et al. 18,19