KINETICS AND MECHANISM FOR QUARTERNIZATION OF TERTIARY PHOSPHINES WITH UNSATURATED CARBOXYLIC ACIDS AND THEIR DERIVATIVES |
| 3 | |
| 2013 |
| scientific article | 547.241 | ||
| 121-127 | tertiary phosphines, unsaturated carboxylic acids, phosphonium zwitterions, reactivity, correlation analysis, kinetic isotope effect, kinetics and reaction mechanism. |
| The kinetics of reactions of triphenylphosphine with unsaturated carboxylic acids and their derivatives in acetic acid has been studied. The quarternization process is shown to be described by the third-order kinetic equation (regardless of the presence of carboxylic group in the substrate) which includes the concentration of a proton-donor solvent. A quantitative analysis has been made of the influence of substituents at the C=C bond of the substrate on the reaction rate, and the nature of the intermediate has been determined. A kinetic isotope effect has been observed in deuteroacetic acid. The mechanism of the reaction has been proposed. |
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