Kinetics and Mechanism of Nanoparticles-Catalyzed Piperidinolysis of Anionic Phenyl Salicylate

Table 2

The values of empirical constants, and , for and (), at 35°C in the presence of CTABr/ nanoparticles^a.

	NaOH/XH	(mM)	(mM)	10^3  (s^−1)	10^3  (s^−1)	10^3  (M^−1s^−1)	(M^−1)		(M^−1)	(M^−1)		range (mM)
Na1	1.04	11.7	10.6	30.7 ± 0.5^k	2.20 ± 0.03^k	417 ± 12^k	17.7 ± 0.9^k	0.77	1876	1444	58	12–100
Na21	2.50	13.0	11.6	30.5 ± 0.2	2.26 ± 0.04	488 ± 18	23.5 ± 1.3	0.68	2491	1694	68	15–120
Na2	1.04	12.2	10.8	30.3 ± 0.1	2.20 ± 0.03	926 ± 70	30.0 ± 2.6	1.0	3180	3180	127	13–21
Na22	2.50	10.0	9.6	30.3 ± 0.6	2.20 ± 0.03	891 ± 103	30.4 ± 4.2	0.97	3222	3125	125	12–21

3H ₀ = 0.2 mM, = 365 and 370 nm for and , respectively, 30 mM NaOH, 100 mM Pip, and 15 mM CTABr and aqueous reaction mixture for each kinetic run contains 2%v/v CH₃CN. ^bCalculated by an iterative technique as mentioned in the text. ^cObtained by graphical technique as mentioned in the text. ^dThe value of is the mean value of obtained within range where values remained independent of at = 0. ^eThe value of is the mean value of values obtained within [] range 0.0–≤ at = 15 mM. = /(). = where = 7 × 10³ M⁻¹ and = 15 mM. = × . = / with = 25 M⁻¹. ^jTotal concentration range of used in the data analysis. ^kError limits are standard deviations.