4727-41-7Relevant articles and documents
Casanova,Rutolo
, p. 2347 (1969)
One-electron Reduction of Sulphonium Salts in Aqueous Solution: a Pulse Radiolysis Study
Bonifacic, Marija,Anklam, Elke
, p. 243 - 248 (2007/10/02)
Absolute rate constants have been measured for the reduction of 1-alkylthiolanium (1a-c), 1-alkylthianium (2a-e), 1-(n-carboxyalkyl)thiolanium (3a,b) and 1-(n-carboxyalkyl)thianium (4a,b) salts, and ω-dimethylsulphonioalkanoic acids (5a,b), including biologically active S-methylmethionine (6) and dimethyl-β-propiothetin (5b), by hydrated electrons in aqueous solutions using the pulse radiolysis method.This reaction was found to occur very rapidly (k in the range 109-1010 dm3mol-1s-1), the individual rate constants being dependent on the electron inductive power of the substituents on the positive sulphur centre.The sulphuranyl radical R3S., a possible reaction intermediate, could not be detected within the 0.1 μs time resolution of the applied technique.No reaction was observed between S-methylmethionine and CO2.- or Me2C.OH under experimental conditions.The one-electron reduction potential of this sulphonium salt has been estimated to be -aq. were characterized by using p-benzoquinone as a radical scavenger.It was found that ring opening is the predominant process rather than the cleavage of methyl or methyl radicals.