Ruthenium(III) Catalysis in Perborate Oxidation of 5-Oxoacids

Table 8

Influence of borate and boric acid^a.

10^3[Oxidant]0; (mol dm^−3)	10^2[NaBO2]0; (mol dm^−3)	10^2[H3BO3]0; (mol dm^−3)	10^3; (s^−1)
			Perborate							Hydrogen peroxide
			p-OCH3	p-CH3	p-C6H5	–H	p-Cl	p-Br	m-NO2	p-OCH3	p-CH3	p-C6H5	–H	p-Cl	p-Br	m-NO2
2.0	—	—	23.28	11.64	8.49	7.65	2.35	1.20	0.59	23.38	11.68	8.53	7.68	2.36	1.20	0.59
2.0	1.0	—	24.35	12.17	8.88	8.00	2.46	1.25	0.62	24.38	12.18	8.89	8.01	2.47	1.25	0.62
2.0	—	1.0	24.60	12.29	8.97	8.08	2.48	1.26	0.62	23.98	11.98	8.75	7.88	2.43	1.23	0.61
1.0	—	—	23.77	11.88	8.68	7.81^b	2.40	1.22	0.60	—	—	—	—	—	—	—

^a10²[5-Oxoacid]₀ = 4.0 mol dm⁻³; 10²[H⁺] = 9.88 mol dm⁻³; *10⁴[Ru(III)] = 1.0 mol  dm⁻³; HOAc—H₂O = 1 : 1% (v/v); temp. = 308 K.
^b10²[Acrylonitrile] = 1.0 mol dm⁻³.