707 
Table III. Hydrolysis constant is in 10°? (n+) at 70°C. 
In parentheses, the half-life in hours. 


COMPOUND n-HCl pH=1 2 3 4 6 7 8 9 
E 600 (I) 736 crag) 3.06 3.00 2485 2.85 OT 6.0 7.5 ES ee 
(9.4) (18.5) (22.7) (23) (24.4) (24.4) (18) GUL 3) C952) (2.1) 
E 605 (IV) 1.84 2.09 2 oD 3.28 397 3.56 5. 36 8.86 16.7 Pan ay 
C747) (34) (27) (2 C175) (1955) (13) C728) (4-71) C207) 
Prep. S 7/6 8.38 3.56 et 3.06 3436 3,36 4.48 8.0 oye Bi 25.6 
(XXII) (83) (19°25) (22,33) (22.6) (20.6) (19.5) (15.5) (8.7) (8.5) CF 27) 
PO-Systox (VII) 0.6 2649 5.69 6.79 6.85 7 le 7.30 8.13 8.18 16.3 
(115) (28) (12) (10) (10) (10) (925) (8.5) (8.5) (4.2) 
PO-Systox-sulfoxide 2a sll 12.70 1 #2 1.86 1.94 2.06 pa AB) FDO +P Ae 42.2 
(XXIIT) (25) (41) (40) (37) (36) (34) (32) (20) (9.3) (1.6) 
PO-Systox-sulfone Byron ee. 1.80 1.84 Las 225 OSL 69.5 188 - 
(XVIT) (20) (36) (39) (38) (38) (31) (10.6) (1) (04:37) ~ 
PO-Methylsystox S7 ‘33 Boe? 14.2 14.1 16.2 LOe2 1943:" 20.3 552 
(VIIZ) (8) (5.2) (5) (4.9) (4.9) (4.3) (358) (3.5) 3.4) Gi.25) 
PO-Methylsystox- aS 550 5.7 5.6 Sail 4.5 a6 PIGS 7.262, 140.5 
sulfoxide (XXIV) Cane) (12.4 CL2..2) (12.4) C12. 625 (15.4). °(12.,.4) (6.3) (2.65) (0.5) 
PO-Methylsystox- 20.1 7.35 6.45 6.45 Pek. 6.45 i Ue a FESS 162 ~ 
sulfone (XXV) (3.4) (93.5) (10.7) (10.8) (9.4) (10.7) (S219 (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 1s 6.83 6.42 6,93 7 el 3. 6.60 7.04 Le 8 ee Sed 138.5 
(XXVITL) (4.5) (10.0) (10.3) (10.0) (9.5) (1035) (9.8) (978): = 63.0 (0.5) 
Prep. S 404 18.4 6.93 6.51 6.51 Vue 6.09 S12 2ae0% 776 - 
(XXVIII) (3.8) (10.0) (16.6) (10.6) (9.5) (11.4) (8.5) (22,3): "*CO.9) - 
