TLé 

Table III. Hydrolysis constant is in 1072K(h-1) at 70°c. 
In parentheses, the half-life in hours. 
COMPOUND n-HC1 pH=1 2 3 4 5 6 7 8 9 
E 600 (I) 7.36 3.77 3.06 3.00 2.85 2.85 3.87 6.0 725 33.5 
(9.4) (18.5) (22.7) (23) (24.4) (24.4) (18) (11.5) (9.2) (2.1) 
E 605 (IV) 1.84 2.05 2.55 3.28 3.97 3.56 5.36 8.86 16.7 25.2 
(37.7) (34) (27) (21) (17.5) (19.5) (13) (7.8) (4.1) (2.7) 
Prep. S 776 8.38 3.56 S11 3.06 3. 36 3.56 4.48 8.0 8.17 25.6 
(XXII) (8.3) (19.5) (22.3) (22.6) (20.6) (19.5) (15.5) (8.7) (8.5) (2.7) 
PO-Systox (VII) 0.6 2.49 5.69 6.79 6.85 7.16 7.30 8.13 8.18 16.3 
(115) (28) (12) (10) (10) (10) (9.5) (8.5) (8.5) (4.2) 
PO-Systox~sul foxide 2.77 1.70 LA72 1.86 1.94 2.06 2.20 3.50 7.42 42.2 
(XXIIT) (25) (41) (40) (37) (36) (34) (32) (20) (9.3) (1.6) 
PO-Systox-sul fone 3.31 1.91 1.80 1.84 1.85 2.25 6.51 69.5 188 - 
(XVII) (20) (36) (39) (38) (38) (31) (10.6) (1) (0.37) - 
PO-Methylsystox 8.7 13.3 13.7 V4.2 14.1 16.2 18.2 19.8 20.3 55.5 
(VIIT) (8) (5.2) (5) (4.9) (4.9) (4.3) (3.8) (3.5) (3.4) (1.25) 
PO-Methylsystox- 13.5 5.6 5.7 5.6 5.7 4.5 5.6 11.0 26.1 140.5 
sulfoxide (XXIV) (5.1) (12.4) = (12.2) (12.4) (12.2) (15.4) (12.4) (6.3) (2.65) (0.5) 
PO-Methylsystox- 20.1 7.35 6.45 6.45 7.4 6.45 13.6 72.3 162 - 
sulfone (XXV) (3.4) (9.5) (10.7) (10.8) (9.4) (10.7) (5.1) (0.96) (0.42) - 
Prep. S 481 - 132 156 155 158 234 224 246 ~ - 
(XXVI) ~ (0.52) (0.44) (0.45) (0.44) (0.3) (0.31) (0.28) - - 
Prep. S 410 13.5 6.83 6.72 6.93 7.25 6.60 7.04 11.9 23.1 138.5 
(XXVIT) (4.5) (10.0) (10.3) (10.0) (9.5) (10.5) (9.8) (5.8) (3.0) (0.5) 
Prep. S$ 404 18.4 6.93 6.51 6.51 125 6.09 8.12 25.0 77.6 - 
(XXVIII) (3.8) (10.0) (10.6) (10.6) (9.5) (11.4) (8.5) (2.8) (0.9) - 
