Substituenteneinfluss der phosphino- und der phosphinylgruppe auf die reaktivität aromatischer verbindungen—I : Kinetische untersuchungen des substituenteneinflusses

To get a basis for the molecular-orbital discussion of the effect of phosphino (R₂P) and phosphinyl (R₂P = 0) groups on the reactivity of organic molecules the relative rate constants of four types of reactions are measured by standard kinetic methods. The results show, that both the phosphino and the phosphinyl group increase the rate of alkaline hydrolysis of 4-X-Benzoic-acid-methylester and of aromatic nucleophilic displacement on 4-X-Fluorobenzene, while the rate of methanolysis of 4-X-(α-Chloro-ethyl)-benzene is greater for X = R₂P than for X = H, but smaller for X = R₂PO than for X = H.