Kinetics and mechanism of nanoparticles (CTABr/MX/H2O)-catalyzed piperidinolysis of ionized phenyl salicylate. 1

Counterion‐Induced Cationic Flexible Nanoparticle Catalytic of Piperidinolysis of Phenyl Salicylate

“…However, it has been concluded elsewhere [21,25] that X -/PSais the most effective ion exchange process that could affect k obs . The effective occurrence of ion-exchange process of X -/ PSahas been found to be the reason for the decrease in the micellar binding constant of PSa -, K S , with the increase in [MX] through an empirical relationship as shown by the following equation [26]:…”

“…It is widely known that the ability of surfactant to form nanoparticle aggregates such as micelles could create different media in reaction phases that might affect the rate of the reactions [39,40]. A pseudophase micellar (PM) model can be used to explain the effect of TTABr micelles on the rate of nucleophilic reaction between Pip and PSa - [41] as 4) and (5) with kinetic parameters (k 0 , h, K X/S and k 0 , X k cat , K X/S ) listed in Table 1, at ½4-FBzNa] op 0 ¼ 0:0046 (filled circle), 0.0093 (filled triangle) and 0.0131 (filled diamond) 4) and (5) with kinetic parameters (k 0 , h, K X/S and k 0 , X k cat , K X/S ) listed in Table 1 [26].…”

“…The effect of different inert inorganic and organic salts (MX) on the pseudo first-order reaction constant (k obs ) for the nucleophilic reaction between piperidine (Pip) and ionized phenyl salicylate (PSa -), in the presence of a constant concentration of cationic flexible nanoparticles (CFN), has been studied and analyzed through a method involving the semiempirical kinetic (SEK) approach developed from the classical pseudo-phase micellar model [21,25]. It has been shown that the extent of the catalytic effects of CTABr/MX/ H 2 O can give the value of the ion exchange constant, K Br X [26]. The values of K Br X for X = mono-substituted halobenzoate ions at constant [CTABr] T (where CTABr and [] T represent cetyltrimethylammonium bromide and total concentration, respectively) have been determined and listed elsewhere [27][28][29][30][31].…”

Kinetics and Mechanism of Cationic Flexible Nanoparticles (CFN) – Catalyzed Piperidinolysis of Anionic Phenyl Salicylate: CFN = TTABr/MX/H₂O with MX = NaCl, NaBr; C_nH_2n+1CO₂Na, n = 4, 5, 6 and 7

“…27 . A brief mechanism for the piperidinolysis of PSa under present experimental conditions, can be considered to be same as described elsewhere 24 .…”

Study of Cationic and Nonionic Mixed Micelles with NaBr and 3,5-Cl₂C₆H₃CO₂Na by Use of Probe Nucleophilic Reaction of Piperidine with Ionized Phenyl Salicylate

“…The behavior of pure cationic micelles HDABr , for the reaction of piperidine with ionized phenyl salicylate, in the presence of MX, 3,5-dichlorosodium benzoate 3,5-Cl 2 C 6 H 3 CO 2 Na , was recently studied 19 . However, the article has not reported such behavior in the presence of mixed micelles.…”