ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The kinetics of the aquation of (H2O)5Cr(O2CCCl3)2+ have been examined at 35-55°C and 1.00M ionic strength with [H+] = 0.01-1.00M. The reaction follows the rate equation -d ln [Crtotal]/dt = (a[H+]-1 + b + c[H+])/(1 + d[H+]), where [Crtotal] is the stoichiometric concentration of the complex. At 45°C a = (1.41 ± 0.03) × 10-7M/s, b = (1.66 ± 0.02) × 10-5 s-1, c = (7.0 ± 0.8) × 10-5M-1·S-1 and d = 2.3 ± 0.3M-1. Two mechanisms consistent with this rate law are discussed, with evidence being presented in favor of an ester hydrolysis mechanism involving steady-state intermediates. Equilibrium and activation parameters were determined.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550131110
