The hydroxide-assisted hydrolysis of cyanogen chloride in aqueous solution.
The hydrolysis of cyanogen chloride (ClCN) was studied as a function of temperature and pH. Results were used to resolve discrepancies among previously reported kinetic constants. The pH dependence was studied over a range of 9.54-10.93 at a temperature of 21.0 degrees C. The effect of temperature was investigated over the range of 10-30 degrees C at a pH of approximately 10. Changes in the concentrations of ClCN and the reaction products cyanic acid and chloride ion were monitored with time. For the conditions corresponding to these experiments, the hydroxide-assisted hydrolysis pathway predominated. Collision frequency factor and activation energies recommended to represent the hydrolysis of ClCN in aqueous solution are A = 2.06 x 10(11) M-1 s-1 and Ea = 60,980 J mol-1 for the hydroxide-ion-assisted reaction, and A = 9.97 x 10(8) s-1 and Ea = 87,180 J mol-1 for the water-assisted reaction.
School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA.
E J
EJ
Pedersen
B J
BJ
Mariñas
D003486:Cyanides / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D006878:Hydroxides / Q000378:metabolism*; D007700:Kinetics; D008956:Models, Chemical; D012996:Solutions; D013696:Temperature
D003486:Cyanides; D006878:Hydroxides; D012996:Solutions; C014430:cyanogen chloride