Kinetics and Mechanism of Hydrolysis of Mono-2,4,6-tribromothiophenyl Phosphate via Conjugate Acid Species

Abstract

Kinetic Study of mono–2,4,6–tribromothiophenyl phosphate has been made in acid region (0.1 to 8.0 mol dm^–3) at 50ºC. Acid log rate profile has a rate maximum at 7.0 mol dm^–3. Ionic strength data up to 3.0 μ requires the participation of conjugate acid species and to determine theoretical rates. Theoretical rates, estimated from second empirical term of Debye-Hückel equation, have been found in close agreement with experimental rates. Bimolecular behaviour has been decided by the Arrhenius parameters and by the analysis of molecularity data. The monoester involves P–S bond fission which is strengthened by comparative kinetic data.