Oxidation of Acetonaphthones by Hexacyanoferrate(III)

14

Spectrophotometric Determination of Basicities of Substituted Naphthoic Acids

1149-115

Aminolysis of substituted phenyl thiolacetates by imidazole

627-632A series of m- and p-substituted phenyl thiolacetates have been prepared. The kinetics of aminolysis of these acetates by imidazole have been followed at 20ᵒC and an ionic strength of 0.1 mol dm-3 at different pH in water containing traces of dioxan. The non-linear Hammett plot and the nonlinear plot between log k2 and log k(OH) indicate the possibility of two types of mechanism, viz., unassisted nucleophilic substitution for the compounds having electron-withdrawing groups in the leaving moiety and general acid-assisted nucleophilic substitution for the compounds having electron-releasing groups in the leaving moiety

Kinetics of Base-catalysed Iodination of Substituted Acetonaphthones

646-64

Silver Ion Assisted Solvolysis of Substituted ω-Bromoacetonaphthones in Aqueous Ethanol

237-23

Formation Constants of Cyanohydrins of Substituted Acetylbiphenyls

74-7

Kinetics of oxidation of substituted 2-phenylthiazolidines by pyridinium chlorochromate

877-880Kinetics of oxidation of 2-phenylthiazolidine (PT) and substituted PI (SPT) by pyridinium chlorochromate (PCC) in dry acetic acid have been investigated. The reaction is first order in FCC and fractional order in PT and it exhibits Michaelis-Menten kinetic character. The complex formation constants (K) and the decomposition rate constants (k1) have been computed from the double reciprocal plots of 1/kobs versus 1/[PT]0. The decomposition rate constants are not correlated by Hammett σ constants. Nevertheless, they show satisfactory correlation with σ1 and σ2 parameters. The correlation with Swain and Lupton F and R values is relatively less satisfactory

Kinetics of Esterification of ortho-Substituted Phenoxyacetic, Phenylmercaptoacetic, Phenylsulphinylacetic & Phenylsulphonylacetic Acids with Diazodiphenylmethane in Dimethylformamide

1034-103

Kinetics of the reaction of phenacyl bromide with substituted 2-phenylthiazolidines

431-433The kinetics of the reaction of phenacyl bromide with several 2-(m- or p-substituted phenyl)thiazolidines have been studied at 30.0°, 35.0° and 43.0°C in ethanol. The reaction follows second order kinetics, first order in each reactant. Electron-releasing substituents in SPT facilitate the reaction, whereas electron-withdrawing substituents have a retarding effect. The correlation with σ values yields a better ρ value of -1.93 at 43.0°C. A similar correlation at 30.0°C provides a ρ value of -1.14. From the Bronsted plot the value of α= 0.91 is obtained. There is evidence for a triangular transition state in the reaction

Kinetics of oxidation of styryl ketones by pyridinium chlorochromate

37-41The kinetics of oxidation of substituted styryl phenyl ketones and of substituted Styrylmethyl ketones by pyridinium chlorochromate (PCC) have been studied in 90% acetic acid-10% water (v/v) containing perhloric acid and NaCIO4, at 30°, 40°, 50° and 60°e. The two reactions are first order each in ketones and PCe. The rate constants are well correlated with σ+ constants. The effects of varying [HClO4] and the percentage of acetic acid on the reaction rate have also been studied. A suitable mechanism has been proposed