Table 1.

log k values and solvent parameters for the solvolyses of substrates 1 to 5, at 25.00 °C.

Solventa	YBrb	YClb	NOTsb	Ic	log k
					1	2d	3	4e	5f
80%Ac	−0.7	−0.8	−0.42	−0.23	—	−2.75g	—	−4.22	−5.49
70%Ac	0.2	0.17	−0.42	−0.29	−6.63	−1.88	− 4.08	—	−4.72
60%Ac	1.03	1.00	−0.41	−0.28	−5.94	−1.30	−3.58	−2.64	−4.10
40%Ac	2.44	2.46	−0.38	−0.35	−4.79	−0.51	−2.69	−1.34	−2.79
20%Ac	3.66	3.77	−0.38	−0.40	−3.77	—	—	−0.17	—
100%Me	−1.12	−1.20	−0.04	0.41	−7.98	−2.27	−4.78	−4.06	−5.74
80%Me	0.70	0.67	−0.05	0.14	−6.22	−0.96	−3.68	−2.66	−4.36
70%Me	1.42	1.46	−0.08	0.05	−5.55	−0.48	−3.24	—	−3.73
60%Me	2.04	2.07	−0.13	−0.02	−5.07	−0.07	−2.86	−1.61	−3.14
40%Me	3.14	3.25	−0.21	−0.13	−4.19	—	—	−0.67	—
20%Me	3.94	4.10	−0.35	−0.26	—	—	—	0.08	—
100%Et	−2.40	−2.50	0.00	0.20	—	−3.38	−5.60	−5.12	—
80%Et	0.00	0.00	0.00	0.00	−6.66	−1.65	−4.11	−3.27	−4.80
60%Et	1.26	1.38	−0.08	−0.15	−5.49	−0.72	−3.33	−2.20	−3.68
50%Et	1.88	2.02	−0.09	−0.20	−5.01	−0.40	−2.96	—	−3.12
40%Et	2.62	2.75	−0.23	−0.24	−4.46	—	—	−1.06	—
20%Et	3.92	4.09	−0.34	−0.33	—	—	—	−0.04	—
TFE	2.53	2.81h	−3.07	0.37	−5.37	0.50	−3.18	—	−3.42
97% TFE	2.53	2.83	−2.79	0.49	—	—	—	−1.33	—
70% TFE	2.79	2.96	−1.2	0.25	−4.92	—	−2.78	—	−3.07
50% TFE	3.04	3.16	−0.93	0.09	−4.46	—	−2.52	—	—
80TFE20Et	1.42i	1.89h	−1.72	0.52	−6.08	−0.43	−3.79	—	−4.10
60TFE40Et	0.44i	0.63h	−1.01	0.59	−6.74	−1.27	−4.33	—	−4.96
40TFE60Et	−0.57	−0.48h	−0.55	0.43	−7.33	−2.03	−4.79j	—	−5.54
97% HFIP	4.51	5.08	−4.27	0.73	—	—	—	—	−1.88
Water	4.44	4.57	−0.44	−0.45	−3.09	—	—	—	—

^aAc, Me, Et, TFE refer to acetone, methanol, ethanol and 2,2,2-trifluoroethanol, respectively. The number indicates the volume percent of the particular solvent in the mixture, except for the mixtures TFE-water in which the number refers to weight percent.

^bFrom ref. [8].

^cFrom ref. [23].

^dL. Moreira unpublished work. Higher log k values were obtained by extrapolation, from appropriate mixtures not used in the correlations.

^eFrom refs. [6] and [27].

^fFrom ref. [20].

^gFrom ref. [31].

^hFrom ref. [33].

ⁱValues kindly provided by K-T Liu.

^jFrom ref. [32].