International Journal of Chemical Kinetics p. 88 - 97 (2016)
Update date:2022-08-11
Topics:
Singh, Bula
Das, Ranendu Sekhar
Banerjee, Rupendranath
Mukhopadhyay, Subrata
In acetate buffer media (pH 4.5–5.4) thiosulfate ion (S2O32?) reduces the bridged superoxo complex, [(NH3)4CoIII(μ-NH2,μ-O2)CoIII(NH3)4]4+ (1) to its corresponding μ-peroxo product, [(NH3)4CoIII(μ-NH2,μ-O2)CoIII(NH3)4]3+ (2) and along a parallel reaction path, simultaneously S2O32? reacts with 1 to produce the substituted μ-thiosulfato-μ-superoxo complex, [(NH3)4CoIII(μ-S2O3,μ-O2)CoIII(NH3)4]3+ (3). The formation of μ-thiosulfato-μ-superoxo complex (3) appears as a precipitate which on being subjected to FTIR shows absorption peaks that support the presence of Co(III)-bound S-coordinated S2O32? group. In reaction media, 3 readily dissolves to further react with S2O32? to produce μ-thiosulfato-μ-peroxo product, [(NH3)4CoIII(μ-S2O3,μ-O2)CoIII(NH3)4]2+ (4). The observed rate (k0) increases with an increase in [TThio] ([TThio] is the analytical concentration of S2O32?) and temperature (T), but it decreases with an increase in [H+] and the ionic strength (I). Analysis of the log At versus time data (A is the absorbance of 1 at time t) reveals that overall the reaction follows a biphasic consecutive reaction path with rate constants k1 and k2 and the change of absorbance is equal to {a1 exp(–k1t) + a2 exp(–k2t)), where k1 > k2.
View MoreWuhan Kemi-Works Chemical Co., Ltd
website:http://www.kemiworks.com
Contact:86-27-85736489
Address:Rm. 1503, No. 164, Jianghan North Rd., Wuhan, 430022 China
Evergreen Chemical Industry Ltd.
Contact:86-553-4918210
Address:6#2-602 Wanhaobailing
Contact:852-27701081
Address:Room 2509, New Tech Plaza, 34 Tai Yau St., San Po Kong, HK
Zhejiang Quzhou Jiancheng Silicone Co., Ltd.(Shanghai Jiancheng Industial and Trade Co, Ltd)
Contact:18957018777 +86-570-3888777
Address:The company production base address: Quzhou City, Zhejiang Province high-tech industrial park Nianhua Road 37
Henan Techway Chemical Co.,Ltd.
website:http://www.techwaychem.com
Contact:+86-371-66380080
Address:No.27 Shunhe Road,
Doi:10.1016/j.ejmech.2013.02.022
(2013)Doi:10.1039/c39930000109
(1993)Doi:10.1055/s-2002-33921
(2002)Doi:10.1016/0277-5387(94)80012-X
(1994)Doi:10.1002/anie.201706373
(2017)Doi:10.1021/ja01632a105
(1954)