ZBY 
Table II. The hydrolysis constant is in K-100(h™*) . 
In parenthesis, the half-life in days. 
the compounds exhibit greatest stability. 
effects on hydrolysis. 
COMPOUND 
E 600 (1) 
E 605 (IV) 
Prep. S 776 (XXII) 
PO-Systox (VII) 
PO-Systox-sulfoxide 
(XXIII) 
PO-Systox-sulfone (XVII) 
PO-Methylsystox (VIII) 
PO-—Methylsystox- 
sulfoxide (XXIV) 
PO-Methylsystox-sulfone 
(XXV) 
Prep. S 481 (XXVI) 
Prep. S 410 (XXVII) 
0° 
0.0054 
(5350) 
0.00021 
(13800) 
0.0054 
(5350) 
0.0005 
(5800) 
0.00018 
(16000) 
0.00018 
(16000) 
0.002 
(1450) 
0.0006 
(4800) 
0.0006 
(4800) 
0.2 
(14.5) 
0.00055 
(5200) 
1G. 
0.0024 
(1200) 
0.00096 
(3000) 
0.0024 
(1200) 
0.003 
(960) 
0.00085 
(3400) 
0.00085 
(3400) 
0.008 
(360) 
0.003 
(970) 
0.003 
(970) 
0.6 
(4.8 
0.0027 
(1070) 
20° 30° 
0.009 0.031 
(320) (93) 
0.0042 0.016 
(690) (180) 
0.009 0.031 
(320) (93) 
0.014 0.054 
(206) (54) 
0.0037 0.014 
(780) (206) 
0.0037 0.014 
(780) (206) 
0.033 0.122 
(88) (25.8) 
0.0122 0.047 
(236) (61.7) 
0.012 0.047 
(236) (61.7) 
1.60 4.08 
(1.8) (0.71) 
0.012 0.045 
(240) (63) 
40° 
0.10 
(29) 
0.058 
(50) 
0.10 
(29) 
0.185 
(15.6) 
0.051 
(57) 
0.050 
(57) 
0.385 
(7.5) 
0.16 
(18) 
0.16 
(17) 
9.86 
(0.293) 
0.162 
(18) 
BO. 
0.30 
(9.6) 
0.19 
(15) 
0.30 
(9.6) 
0.64 
(4.5) 
0.16 
(18) 
0.16 
(18) 
1.42 
(2.03) 
0.56 
(5.2) 
0.56 
C342) 
(5:25) 
All measurements were made at pH 1-5 where 
At this pH the solution had minimal 
Fe 
2) 
3.94 
3.80 
3.45 
3.85 
3.80 
3.80 
3.70 
D«So 
3.85 
