Prediction of the Lipophilicity of Some Plant Growth Stimulators by RP‐TLC and Relationship Between Slope and Intercept of TLC Equations

Abstract

Using RP‐TLC with RP‐18 F254s and a methanol‐water mixture as the mobile phase, several new compounds (some plant growth stimulators, such as amido esters of ethanolamine and maleic and succinic acid derivatives) were studied. The log P values were calculated using fragmental constant or ACD/Labs Software database (Toronto, Canada). A good correlation was obtained between log P vs. R M0 and C 0, respectively. These relationships can be used for prediction of the lipophilicity of similar compounds from the same structural group. The relationship between intercepts and slopes from TLC equations showed a very good correlation. The results obtained by RP‐TLC demonstrated a basic feature of lipophilicity; that both series of compounds are two “congeneric” series.