Novel oscillatory reactions involving double substrate

• Published in: Chemical physics letters Vol. 369; no. 3; pp. 434 - 440
• Main Authors: Rastogi, R.P., Chand, Prem
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 17.02.2003; Elsevier Science
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Theory of reactions, general kinetics; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Bromates; Oxalic acid; Cerium Atomic ions; Theoretical study; Belousov-Zhabotinsky reaction; Experimental study; Fructose; Oscillating reaction; Sulfuric acid
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/S0009-2614(02)01980-2

The oscillatory features of a novel type B–Z type oscillator, fructose [F] + oxalic acid [OA]+Ce 4++BrO 3 −+H 2SO 4 has been investigated. The induction time is found to be usually small or negligible. Both single frequency oscillations and two oscillatory states separated by a time-pause are observed. Oscillations occur between two critical limits of [F] and [OA]. A tentative mechanism has been suggested which involves both Br − ion control and free radical control. Computer simulation correctly predicts some of the oscillatory features such as (i) time of initiation, (ii) critical limits of [OA] and (iii) stoppage of oscillations by higher [Br −], confirming the primary role of Br − control mechanism.