title: Kinetics and mechanism of the reactions of S-2,4-dinitrophenyl 4-substituted thiobenzoates with secondary alicyclic amines.
abstract: [reaction: see text] The title reactions, in 44 wt % ethanol-water at 25.0 degrees C, exhibit slightly curved Brønsted-type plots (log kN versus pKa of amines) with slopes beta1 = 0.1-0.44 (at high pKa) and beta2 ca. 0.7 (at low pKa). The magnitude of some of these slopes, together with the fact that the curvature center (pKa(0) = 9.5-10.8) does not change with the electronic effects of the benzoyl substituent, suggests that these reactions are not stepwise, but concerted.
authors.affiliation: Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 6094411, Chile. ecastro@puc.cl
authors.forename: Enrique A
authors.initials: EA
authors.lastname: Castro
authors.forename: Raul
authors.initials: R
authors.lastname: Aguayo
authors.forename: Jorge
authors.initials: J
authors.lastname: Bessolo
authors.forename: José G
authors.initials: JG
authors.lastname: Santos