STUDY OF CATALYTIC ACTIVITY OF NICKEL(II)–LEUCINE COMPLEX ON THE DECAY OF CUMENE HYDROPEROXIDE IN AQUEOUS SOLUTION

Abstract

The formation of Ni(II)–Leucine (Leu) complex (1:1) is established. It acts as a model homogeneous catalyst on the decay of cumene hydroperoxide (ROOH) in the studied system H₂O–Ni²⁺–Leu–ROOH. ROOH catalytic decay rate law is: W₀ = –d [ROOH]₀/dt=K_cat [Ni²⁺Leu]₀[ROOH]₀=K_eff[ROOH]₀. The temperature dependence of ROOH decay rate effective constant K_eff (K_eff=K_cat[Ni²⁺Leu]₀=const) in the 50–70⁰C temperature range can be expressed by Arrhenius equation (the activation energy is expressed in kJ/mol): K_eff = (1.87 ± 0.02)105 exp[(–46.6 ± 0.20)/RT], min^–1.