title: Influence of the solvent description on the predicted mechanism of SN2 reactions.
abstract: The influence of the implicit solvent model on transition state structures of two S N2 reactions of biochemical importance is presented. In the considered methyl transfer reaction, we show experimentally that the rate constant in blood serum is about 60% slower than in the aqueous solution and that the implicit solvent model with slightly modified parameters for water captures correctly the energetics of this reaction. With the example of the reaction between 4-methyl-1,2,4-triazol-3-thione and ethyl bromoacetate, we show that relative stabilities of the conformationally different transition states depend upon the solvent inclusion strategy.
authors.affiliation: Department of Organic Chemistry, Faculty of Pharmacy, Medical University, Staszica 6, Lublin, Poland.
authors.forename: Monika
authors.initials: M
authors.lastname: Wujec
authors.forename: Agata
authors.initials: A
authors.lastname: Siwek
authors.forename: Joanna
authors.initials: J
authors.lastname: Dzierzawska
authors.forename: Michal
authors.initials: M
authors.lastname: Rostkowski
authors.forename: Rafal
authors.initials: R
authors.lastname: Kaminski
authors.forename: Piotr
authors.initials: P
authors.lastname: Paneth
mesh_terms: D000085:Acetates / Q000097:blood / Q000737:chemistry; D006842:Hydrocarbons, Brominated / Q000097:blood / Q000737:chemistry; D007700:Kinetics; D008956:Models, Chemical; D012997:Solvents / Q000737:chemistry*; D014230:Triazoles / Q000097:blood / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000085:Acetates; D006842:Hydrocarbons, Brominated; D012997:Solvents; D014230:Triazoles; D014867:Water; C010144:ethyl bromoacetate