The biomimetic monooxygenation of cyclohexane with some substituted iodosobenzene and iodosobenzene derivatives catalyzed by 5,10,15,20-tetraphenylporphinatoiron chloride [TPPFe(III)Cl] was studied. The electronic effect of para substituents and both the steric and electronic effect of meta substituents in the substituted iodosobenzene were well linear correlated to the yields of cyclohexanol. When either phenyliodosyl diacetate or phenyliodosyl tosylate was used as oxidant, the yields of cyclohexanol were low, close to the case when iodosobenzoic acid or o-iodosobenzoic ester was used (near to zero). All these compounds were much weaker oxidants than iodosobenzene. It may be suggested that the intermol. and intramol. bonding structure-I(OH)OCO- in iodosobenzoic acid and o-iodosobenzoic ester were present. Besides, the effects of the structure of oxygen donor to the activity of oxygenation was discussed.

Key words: PORPHINE P, CHLORO COMPLEX, BENZENE P, IRON COMPLEX, ORGANOIODINE COMPOUNDS, BENZENECARBOXYLIC ACID P, CYTOCHROME, ELECTRONIC EFFECT, BIONICS, CYCLOHEXANE