Abstract: The kinetics of the decomposition of cyclohexyl hydroperoxide(CHHP) in benzene catalyzed by vanadyl dibenzoylmethane[V0(DBM)₂, ] has been studied.It was found that the products of decomposition of CHHPwere cyclohexanol and cyclohexanone, which are produced in about equimolar amount, and the product cyclohexanol obviously inhibited the decomposition of CHHP.The kinetics data can be satisfactorily described by the following equation (with [CHHP]₀>>[VO(DBM)₂]₀)R₀=kK[CHHP]₀[VO(DBM)₂]₀/(¹⁺k[CHHP]₀) This is the kinetic evidence for the formation of a catalyst-hydro-peroxide intermediate.In the equation Kis the stability constant of the catalyst-hydroperoxide intermediate complex;k is the rate constant for the decomposition of the complex. The rate constant Kat 500℃ may be expressed as follows:k=1.9×10⁸exp(-53.7×10³/RT)S^-1 with the activation energy E_a=53.7kJ·mol^-1