Journal of Physical Chemistry p. 545 - 550 (1994)
Update date:2022-08-16
Topics:
Chinake, Cordelia R.
Simoyi, Reuben H.
Jonnalagadda, Sreekantha B.
The reaction between (amnoimino)methanesulfinic acid, HO2SC(NH)NH2(AIMSA), and bromate has been studied in acidic medium.In excess AIMSA the stoichiometry of the reaction is 2BrO3- + 3AIMSA + 3H2O -> 3SO42- + 3CO(NH2)2 + 2Br- + 6H+, and in excess bromate the stoichiometry is 4BrO3- + 5AIMSA + 3H2O -> 5SO42- + 5CO(NH2)2 + 2Br2 + 6H+.Br2 is produced only when BrO3- is in stoichiometric excess over AIMSA.It is produced from the reaction of the product, Br-, with excess BrO3- after all the AIMSA has been consumed.The reaction has an initial induction period followed by formation of bromine.Although AIMSA is oxidized to SO42-, no SO42- formation is observed until Br2 production commences.The reaction is autocatalyzed by bromide.The reactive oxidizing species in solution are HOBr and Br2.Bromide enhances their formation from bromate.A simple eight-reaction mechanism is used to describe the reaction.The reaction commences through a direct reaction between BrO3- and AIMSA: BrO3+ + HO2SC(NH)NH2 + H+ -> HBrO2 + HO3SC(NH)NH2 with k = 2.5E-2M-2s-1.The rate-determining step is the standard BrO3- - Br- reaction which forms the reactive species HOBr:BrO3- + Br- + 2H+ -> HBrO2 + HOBr.A computer simulation analysis of the proposed mechanism gave good fit to the data.
View MoreWuxi Pharma-Trading Import & Export Co.,Ltd.
Contact:+86-510-82304590 82716390
Address:Room 523,Youzu Alliance Building,No.88 Renmin Zhonglu,Wuxi,Jiangsu,China
SuZhou Bichal Biological Technology CO.,LTD
Contact:+86-512-68051130
Address:NO.32 huoju road HI-TECH Industrial development zone SuZhou China
Contact:86-513-84128750/13773795976
Address:No.48.Youyi West Road ,Rudong Development Zone,Jiangsu Province,China
Zhejiang Golden-Shell Pharmaceutical Co.,Ltd.
Contact:+86-576-87501888 / 87501988
Address:No.89 Zhongxing Road. Li'ao, Yuhuan, Zhejiang, China
NINGXIA DARONG CHEMICALS & METALLURGY CO.,LTD.
Contact:86-952-2179751
Address:Darong Road, Dawukou, Shizuishan, Ningxia 753001, China
Doi:10.1016/S0025-5408(02)00939-X
(2002)Doi:10.1002/cbic.201800154
(2018)Doi:10.1021/ja00754a008
(1971)Doi:10.1016/0040-4039(96)00276-6
(1996)Doi:10.1039/c5cc00148j
(2015)Doi:10.1021/ja511552k
(2015)