Oxyhalogen–Sulfur Chemistry: Kinetics and Mechanism of Oxidation of 1,3-Dimethylthiourea by Acidic Bromate

2017 ◽  
Vol 121 (34) ◽  
pp. 6366-6376 ◽  
Author(s):  
Olufunke Olagunju ◽  
Reuben H. Simoyi
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

Oxyhalogen–Sulfur Chemistry: Kinetics and Mechanism of Oxidation of Captopril by Acidified Bromate and Aqueous Bromine

2013 ◽  
Vol 117 (13) ◽  
pp. 2704-2717 ◽  
Author(s):  
G. P. Kapungu ◽  
G. Rukweza ◽  
Thai Tran ◽  
Wilbes Mbiya ◽  
Risikat Adigun ◽  
...  
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

Oxyhalogen−Sulfur Chemistry:  Kinetics and Mechanism of Oxidation of Guanylthiourea by Acidified Bromate1

2004 ◽  
Vol 108 (52) ◽  
pp. 11591-11599 ◽  
Author(s):  
Edward Chikwana ◽  
Adenike Otoikhian ◽  
Reuben H. Simoyi
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

Oxyhalogen–Sulfur Chemistry: Kinetics and Mechanism of Oxidation of N-Acetyl-ʟ-methionine by Aqueous Iodine and Acidified Iodate

2014 ◽  
Vol 67 (4) ◽  
pp. 626 ◽  
Author(s):  
Kudzanai Chipiso ◽  
Wilbes Mbiya ◽  
Moshood K. Morakinyo ◽  
Reuben H. Simoyi
Keyword(s):  
Methionine Sulfoxide ◽  
Kinetics And Mechanism ◽  
Ionization Mass ◽  
Stoichiometric Ratio ◽  
Inhibitory Effects ◽  
Electron Transfer Process ◽  
Sulfur Chemistry ◽  
Methionine Supplementation ◽  
Mechanism Of Oxidation ◽  
Sole Product

The use of N-acetyl-l-methionine (NAM) as a bio-available source for methionine supplementation as well as its ability to reduce the toxicity of acetaminophen poisoning has been reported. Its interaction with the complex physiological matrix, however, has not been thoroughly investigated. This manuscript reports on the kinetics and mechanism of oxidation of NAM by acidic iodate and aqueous iodine. Oxidation of NAM proceeds by a two electron transfer process resulting in formation of a sole product: N-acetyl-l-methionine sulfoxide (NAMS=O). Data from electrospray ionization mass spectrometry confirmed the product of oxidation as NAMS=O. The stoichiometry of the reaction was deduced to be IO3– + 3NAM → I– + 3NAMS=O. In excess iodate, the stoichiometry was deduced to be 2IO3– + 5NAM + 2H+ → I2 + 5NAMS=O + H2O. The reaction between aqueous iodine and NAM gave a 1 : 1 stoichiometric ratio: NAM + I2 + H2O → NAMS=O + 2I– + H+. This reaction was relatively rapid when compared with that between NAM and iodate. It did, however, exhibit some auto-inhibitory effects through the formation of triiodide (I3–) which is a relatively inert electrophile when compared with aqueous iodine. A simple mechanism containing 11 reactions gave a reasonably good fit to the experimental data.

Oxyhalogen−Sulfur Chemistry:  Kinetics and Mechanism of Oxidation ofN-Acetylthiourea by Chlorite and Chlorine Dioxide1

2006 ◽  
Vol 110 (7) ◽  
pp. 2396-2410 ◽  
Author(s):  
Olufunke Olagunju ◽  
Paul D. Siegel ◽  
Rotimi Olojo ◽  
Reuben H. Simoyi
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

Oxyhalogen-Sulfur Chemistry: Kinetics and Mechanism of Oxidation ofN-Acetyl Homocysteine Thiolactone by Acidified Bromate and Aqueous Bromine

2013 ◽  
Vol 117 (49) ◽  
pp. 13059-13069 ◽  
Author(s):  
Wilbes Mbiya ◽  
Boyoung Choi ◽  
Bice S. Martincigh ◽  
Moshood K. Morakinyo ◽  
Reuben H. Simoyi
Keyword(s):  
Kinetics And Mechanism ◽  
Homocysteine Thiolactone ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

Oxyhalogen–Sulfur Chemistry: Kinetics and Mechanism of Oxidation of Chemoprotectant, Sodium 2-Mercaptoethanesulfonate, MESNA, by Acidic Bromate and Aqueous Bromine

2014 ◽  
Vol 118 (12) ◽  
pp. 2196-2208 ◽  
Author(s):  
Risikat Ajibola Adigun ◽  
Morgen Mhike ◽  
Wilbes Mbiya ◽  
Sreekanth B. Jonnalagadda ◽  
Reuben H. Simoyi
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

Oxyhalogen–sulfur chemistry: kinetics and mechanism of oxidation of formamidine disulfide by acidic bromate

2003 ◽  
Vol 5 (19) ◽  
pp. 4149-4156 ◽  
Author(s):  
Nicholas Madhiri ◽  
Rotimi Olojo ◽  
Reuben H. Simoyi
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Formamidine Disulfide ◽  
Mechanism Of Oxidation

Oxyhalogen−Sulfur Chemistry:  Kinetics and Mechanism of Oxidation of Amidinothiourea by Acidified Iodate1

2004 ◽  
Vol 108 (6) ◽  
pp. 1024-1032 ◽  
Author(s):  
Edward Chikwana ◽  
Reuben H. Simoyi
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

scholarly journals Oxyhalogen-sulfur chemistry: Kinetics and mechanism of oxidation of n-acetylthiourea by aqueous bromate and acidified bromate

2016 ◽  
Vol 69 ◽  
Author(s):  
Kudzanai CHIPISO ◽  
Wilbes MBIYA ◽  
Thai TRAN ◽  
Reuben H SIMOYI
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfur Chemistry ◽  
Mechanism Of Oxidation

Kinetics and Mechanism of Oxidation of Labetalol by Hexacyanoferrate(III) in Alkaline Medium

2012 ◽  
Vol 3 (2) ◽  
pp. 131-133
Author(s):  
ANNAPURNA NOWDURI ◽  
◽  
Apparao Babu Duggada ◽  
Vijaya Raju Kurimella
Keyword(s):  
Alkaline Medium ◽  
Kinetics And Mechanism ◽  
Mechanism Of Oxidation
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