Journal of Chemistry

Research Article

Kinetics and Mechanism of Oxidation of Carbenicillin by Copper (III) Periodate Complex in Aqueous Alkaline Medium

Table 1

Effect of variation of [DPC], [CRBC], and [KOH] on the oxidation of carbenicillin by diperiodatocuprate (III) in aqueous alkaline medium at 298 K and I = 0.10/mol dm⁻³.


[DPC] × 10⁵	[CRBC] × 10⁴	[OH^-] × 10²	[IO₄^-] × 10⁵	k_u × 10⁻⁴ (s⁻¹)	Order

1.0	5.0	0.8	1.0	1.22
3.0	5.0	0.8	1.0	1.24
5.0	5.0	0.8	1.0	1.25
8.0	5.0	0.8	1.0	1.21
10.0	5.0	0.8	1.0	1.22

5.0	1.0	0.8	1.0	0.41	0.718
5.0	3.0	0.8	1.0	0.81
5.0	5.0	0.8	1.0	1.25
5.0	8.0	0.8	1.0	1.80
5.0	10.0	0.8	1.0	2.34

5.0	5.0	0.2	1.0	0.62	0.50
5.0	5.0	0.4	1.0	0.82
5.0	5.0	0.6	1.0	1.01
5.0	5.0	0.8	1.0	1.25
5.0	5.0	1.0	1.0	1.61

5.0	5.0	0.8	1.0	1.25	−0.265
5.0	5.0	0.8	3.0	1.05
5.0	5.0	0.8	5.0	0.85
5.0	5.0	0.8	8.0	0.72
5.0	5.0	0.8	10.0	0.68

^∗Concentrations are expressed in mol dm⁻³. Bold values in [DPC] × 105, [CRBC] × 104, [OH⁻] × 102, and [IO4⁻] × 105 signify the variable concentration of each solution for each kinetic run, whereas other values signify constant concentration of solutions used in experiments. Bold values in ku × 10−4 (s−1) signify the average rate constant calculated after conducting the experiment for the corresponding bold value (concentration) of that solution only. Bold values in order signify the exact order of reaction as obtained from the plot.