Identification of the three Isomers of Monochlorophenol: Application of Briggs-Rauscher Oscillation

A Briggs-Rauscher oscillating system has been established for the identification of the isomers of monochlorophenol (MCPs). The samples were assessed, based on their different perturbations behavior’s, in the reaction, over the concentration range of 1.5 × 10 -8 to 1.25 × 10 -3 molL 1 . In the system; substrate malic acid, and a complex macrocyclic nickel [NiL](ClO 4 ) 2 catalyst were used. The obtained data have shown that individually injected isomers at the same concentration, give distinct perturbation behaviors. 2- Chlorophenol (2-CP) caused a change in period of oscillation, at the lower concentration but 3-Chlorophenol (3-CP) and 4-chlorophenol (4-CP) did not show their reactivity, while at the higher concentration, 2-CP quenching the oscillation that could not be regenerated, 3-CP show stability in the system, However, 4-CP caused the change in the period of active oscillation. Linear regression analysis relationships were found, in the change of oscillation period and the decrease of oscillation number to the increases of concentration of 2-CP and 3-CP. The detection of limits was 6.75 × 10 -8 molL -1 and 1 × 10 -3 molL -1 for 2-CP, and 4-CP respectively. The oxidizing process of 2-CP and 3-CP, described on the base of the suggested FCA (Furrow-Cervellati-Amadori) model. The formation of product of 2-CP and 4-CP in reaction was identified by UV-spectroscopy .