Equilibrium and kinetic study for the reaction of Trans-K [Cr (ox)‎ z (H20)‎ 2].3Hz0 with 4-aminoantipyrine

الملخص EN

A new complex of Cr(III) has been prepared, The kinetics and equilibrium study of the substitution reaction ؛ the complex-K[Cr(ox)2(H;2(0؛l.3H20 1}, with 4-aminoantipyrine {AAP^ have been performed in aqueous media at (pH = 4.9, 5.6 and 6.0) (ji=0.4M NaNCh).

Activation parameters for the reactions are (Eai = l.891 kCal mo89.29= ,1'؛ kCal' and .AS* I = 0.281 Cal.

mol') and (Ea;=0.487kCal mol"1.

AHN =62.03 kCal mol‘1 and 92.8- =Cal').

The observed rate constants are in good agreei^ent with substitution reaction of the complex with amino acids(ا)and other an؛ons(2).