Kinetics and Mechanism of Oxidation of Triethylene Glycol and Tetraethylene Glycol by Ditelluratoargentate (III) in Alkaline Medium

Table 2

Rate constants (𝑘) and activation parameters of the rate-determining step (𝑇=298.2K).

𝑇/𝐾		293.2	298.2	303.2	308.2	313.2
10^3 𝑘/s^−1	Triethylene glycol	7.84	11.21	16.27	20.85	28.22
	Tetraethylene glycol	8.61	11.71	16.98	22.02	29.86
Thermodynamic activationparameters	Triethylene glycol	Ea/(kJ·mol^−1) = 48.64, ΔH^≠/(kJ·mol^−1) = 46.16,
		ΔS^≠/(J·K^−1·mol^−1) = −127.51, 𝑇=298.2K
	Tetraethylene glycol	Ea/(kJ·mol^−1) = 47.63, ΔH^≠/(kJ·mol^−1) = 45.16,
		ΔS^≠/(J·K^−1·mol^−1) = −130.34, 𝑇=298.2K

The plot of ln𝑘 versus 1/𝑇 have following intercept (a), slope (b), and relative coefficient (𝑟).
Triethylene glycol: 𝑎 = 15.13, 𝑏 = −5850.17, 𝑟 = 0.997. Tetraethylene glycol: 𝑎 = 14.79, 𝑏 = −5729.47, 𝑟 = 0.998.