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- W2016752808 abstract "Rate constants have been measured for the proton and deuteron transfer reactions of bis(2,4-dinitrophenyl)methane (1) with 1,1,3,3-tetramethylguanidine (TMG) and 1,5-diazabicyclo[5.4.0]undec-7-ene (DBU) in dimethyl sulfoxide (DMSO) and toluene solvents. Equilibrium constants, primary deuterium kinetic isotope effects, and activation parameters are reported. The reaction of 1 with DBU is faster than that with TMG by factors of 5 and 50 in toluene and DMSO respectively. The primary deuterium kinetic isotope effects, k H /k D = 7–9, which are independent of the polarity of the solvent, indicate an uncoupled mechanism of proton transfer and are in the classical region with little or no indication of a tunnelling contribution to the enthalpy of activation for these reactions. Key words: proton transfer, bis(2,4-dinitrophenyl)methane, deuterium isotope effects." @default.
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- W2016752808 date "1991-03-01" @default.
- W2016752808 modified "2023-10-12" @default.
- W2016752808 title "The proton transfer reaction between bis(2,4-dinitrophenyl)methane and nitrogen bases in dimethyl sulfoxide and toluene solvents" @default.
- W2016752808 cites W2983722198 @default.
- W2016752808 doi "https://doi.org/10.1139/v91-070" @default.
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