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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

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BMC Chemistry

ISSN: 2661-801X

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