Tuning Reactivity of Platinum(II) Complexes

N
N Pt Cl + NU N Pt NU + Cl
N
+
where NU = TU, DMTU, TMTU, SCN - , I - , Br -
k 2
k -1
N
N
A typical kinetic trace recorded by mixing solutions of CH3PhPtCl (2.50 x 10 -5 M) and
DMTU (1.25 x 10-3 −
M) at an ionic strength of 0.1 M ( CF ) is shown in Figure 3.2
(also Figure SI 3.1 appendix).
2+
16
3 3 SO
Figure 3.2: Spectrum obtained from the stopped-flow spectrometer with a single
exponential fit for the reaction between CH3PhPtCl (2.50 x10 -5 M) and
DMTU (1.25 x 10 -3 M) in methanol followed at 308 nm, I = 0.1 M
(LiCF3SO3), T = 298.15 K.
All the kinetic traces gave excellent fits to first-order exponential decays to generate
observed pseudo first-order rate constants, kobs, at specific concentrations of the
nucleophiles and temperature. The pseudo first-order rate constants, kobs, were plotted
[1 ]