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Table 2 Effect of pH on kobs (s-1) at [CrIII(HIDA)(Val)(H2O)2+] = 2.50 × 10-4 mol dm-3, I = 0.20 mol dm-3 and T = 45°C.

From: Inner-sphere oxidation of ternary iminodiacetatochromium(III) complexes involving DL-valine and L-arginine as secondary ligands. Isokinetic relationship for the oxidation of ternary iminodiacetato-chromium(III) complexes by periodate

102 [IO4-]
mol dm-3
104 kobs (s-1)
pH 3.68
3.34 2.92 2.62
0.5 2.28 ± 0.04 1.69 ± 0.02 1.31 ± 0.05 0.82 ± 0.02
1.0 3.55 ± 0.07 2.72 ± 0.03 2.25 ± 0.04 1.48 ± 0.02
1.5 4.58 ± 0.10 3.72 ± 0.04 3.02 ± 0.03 1.95 ± 0.04
2.0 4.93 ± 0.14 4.29 ± 0.07 3.49 ± 0.06 2.28 ± 0.07
3.0 5.25 ± 0.21 4.76 ± 0.12 4.18 ± 0.08 3.07 ± 0.10
4.0 6.06 ± 0.28 5.49 ± 0.17 5.13 ± 0.11 4.20 ± 0.15
5.0 7.35 ± 0.40 6.58 ± 0.26 5.62 ± 0.15 5.00 ± 0.23