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- W2019918556 abstract "Kinetics are reported for the alkaline hydrolysis of 2-anilino-4,6-dichloro-1,3,5-triazines to yield the corresponding mono-hydroxy species. The pseudo-first-order rate constants are independent of general-base concentration and obey the rate law eqn. (i), where K1=Kw/Ka, Ka is the ionisation kobs=(kH2O+kOHK1[OH])/([OH]+K1)(i) constant for the aniline proton and kOH is the bimolecular rate constant for attack of hydroxide ion on the neutral triazine molecule. The parameters kOH and Ka obey Hammett equations with σ°[eqns. (ii) and (iii)]. The kinetically determined pKa of the 4-chloroanilino-4,6-dichloro-1,3,5- log kOH= 1.06 ± 0.15σ°– 0.064 ± 0.054 (r= 0.9709)(ii), pKa=–2.13 ± 0.16 σ°+ 10.92 ± 0.06 (r= 0.9919)(iii) triazine is close to that measured by pH-titration." @default.
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- W2019918556 date "1994-01-01" @default.
- W2019918556 modified "2023-10-14" @default.
- W2019918556 title "Nucleophilic aromatic substitution in heterocycles: alcoholysis and hydrolysis of 2-anilino-4,6-dichloro-1,3,5-triazines" @default.
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- W2019918556 doi "https://doi.org/10.1039/p29940002389" @default.
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