Research Article
Ruthenium(III) Catalysis in Perborate Oxidation of 5-Oxoacids
Table 5
Influence of ionic strength on ruthenium(III) catalysisa.
|
10[KNO3] (mol dm−3) |
102[H+] (mol dm−3) |
103 (s−1) |
103() (s−1) | p-OCH3 | p-CH3 | p-C6H5 | –H | p-Cl | p-Br | m-NO2 | p-OCH3 | p-CH3 | p-C6H5 | –H | p-Cl | p-Br |
| 0 | 0.88 | 18.27 (4.11) | 9.13 (2.05) | 6.66 (1.49) | 6.00 (1.35) | 1.85 (0.42) | 0.94 (0.21) | 0.46 (0.11) | 14.16 | 7.08 | 5.16 | 4.65 | 1.43 | 0.72 | 0.36 | 1.0 | 0.88 | 20.04 (4.01) | 10.32 (2.01) | 7.53 (1.47) | 6.78 (1.32) | 2.08 (0.41) | 1.06 (0.21) | 0.52 (0.10) | 16.63 | 8.31 | 6.06 | 5.46 | 1.68 | 0.85 | 0.42 | 2.0 | 0.88 | 20.33 (4.19) | 10.16 (2.09) | 7.42 (1.53) | 6.68 (1.38) | 2.06 (0.43) | 1.04 (0.22) | 0.51 (0.11) | 16.14 | 8.07 | 5.88 | 5.30 | 1.63 | 0.83 | 0.41 | 0 | 14.9 | 27.33 (11.56) | 13.66 (5.78) | 9.97 (4.22) | 8.98 (3.80) | 2.77 (1.17) | 1.41 (0.59) | 0.69 (0.29) | 15.78 | 7.88 | 5.75 | 5.18 | 1.59 | 0.80 | 0.40 | 1.0 | 14.9 | 28.98 (10.28) | 14.48 (5.14) | 10.57 (3.75) | 9.52 (3.38) | 2.93 (1.04) | 1.49 (0.53) | 0.74 (0.27) | 18.70 | 9.34 | 6.82 | 6.14 | 1.88 | 0.96 | 0.47 | 2.0 | 14.9 | 30.40 (9.61) | 15.20 (4.81) | 11.09 (3.51) | 9.99 (3.16) | 3.08 (0.98) | 1.56 (0.49) | 0.77 (0.25) | 20.88 | 10.44 | 7.62 | 6.86 | 2.11 | 1.07 | 0.53 |
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a103[Perborate]0 = 1.0 mol dm−3; 102[5-oxoacid]0 = 4.0 mol dm−3; *104[Ru(III)] = 1.0 mol dm−3; HOAc—H2O = 1 : 1% (v/v); temp. = 308 K. Parentheses values indicate the rate constant (, s−1) of uncatalyzed reactions.
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