A solution and solid state study of niobium complexes University of ...

Chapter 5
The Stopped-flow data (fast) obtained at four different temperatures was fitted to
Equation 5.9 and the UV/Vis data (slow reaction) was fitted to Equation 5.12. The
results are illustrated in Figures 5.7 and 5.8 respectively.
90
1
[ ]
[ ]
k
2
K1 L
k = +k
obs 1+K L -2
45 °C
35 °C
25 °C
15 °C
(5.12)
Figure 5.7: Plot of kobs vs [acacH] for the fast reaction between [NbCl2(OMe)3(MeOH] and
[acacH] in MeOH at different temperatures, [Nb] = 5 x 10 -5 M, λ = 330 nm.
45 °C
35 °C
25 °C
15 °C
Figure 5.8: Plot of kobs vs [acac] for the slow reaction between [NbCl2(OMe)3(MeOH)] and
[acacH] in MeOH at different temperatures, [Nb] = 5 x 10 -5 M, λ = 310 nm.