Reinvestigation of CH-acid alkalisalts reaction with α, β, β-trifluorostyrene

Kinetic data obtained before on the CH-acid alkali salt reaction with α, β, β-trifluorostyrene (TFS) in dimethoxyethane, in dipolar aprotic solvents, as well as in DMSO mixture with ethanol have been analysed. It is shown that CH-acid alkali salt reactions with TFS decomposition products, which lead to kinetic data distortion, took place as a result of TFS instability together with the reaction of nucleophilic vinyl substitution. The kobserv values obtained newly using the operation methods developed specially for TFS (which application favoured its minimum decomposition) are lower than ones obtained earlier. Taking the 9-phenylfluorene alkali salt reactions as examples, it is shown that this difference is greater for lithium salts (2 orders of the value) and less in case of cesium salts