Theory of proton-transfer reactions. Anomalous Brønsted coefficients of the reaction between 9-alkylfluorene and (9-alkylfluorenyl) lithium

The Brønsted plots of the proton-transfer reactions between 9-alkylfluorene and (9-alkylfluorenyl)lithium are analyzed in terms of the quantum-statistical mechanical rate theory. The anomalous values of the Brønsted coefficients can be explained by taking into account the variation in both steric hindrance and the free energy of the reaction within one reaction series.