Base hydrolysis of the (+)589-cis-[Co(en)2X(glyO)]+ ions (X- = chloride(1-), bromide(1-)) and the importance of ion pairs

1979 ◽  
Vol 18 (7) ◽  
pp. 1990-1996 ◽  
Author(s):  
C. J. Boreham ◽  
D. A. Buckingham ◽  
C. R. Clark
Keyword(s):  
Ion Pairs ◽  
Base Hydrolysis ◽  
Hydrolysis Of

Base hydrolysis of acidopentaaminecobalt(III) ions and the question of common intermediates. Hydrolysis of some t-[Co(tren)(NH3)X]2+/3+ ions (X = NO3-, MeSO3-, Cl-, Me2SO, N3-)

1980 ◽  
Vol 33 (2) ◽  
pp. 263 ◽  
Author(s):  
DA Buckingham ◽  
CR Clark ◽  
WS Webley
Keyword(s):  
Supporting Electrolyte ◽  
Ion Pairs ◽  
Base Hydrolysis ◽  
Rate Law ◽  
Hydrolysis Of

The preparations, and characterizations, of the complex cations t-[Co(tren)(NH3)X]2+/3+* (X = NO3-, Me2SO, H2O, Cl-, N3-) and p-[Co(tren)(NH3)X]2+/3+ (X = N3-, Cl-, H2O) are described. Base hydrolysis of t-[Co(tren)(NH3)X]2+/3+ (X = MeSO3-, Me2SO, NO3-, N3-) and of p- [Co(tren)(NH3)N3]2+ follows the rate law kobs = k[OH-] over the [OH-] range 1.0-10-4 mol dm-3 except for the 3+ ion t-[Co(tren)(NH3)Me2SO]3+ where some curvature is observed at [OH-] > 0.025 mol dm-3. The products for the t-[Co(tren)(NH3)X]2+/3+ ions (X = Cl-, NO3-, MeSO3-, Me2SO) depend on X, and on the presence or absence of supporting electrolyte (1.0 mol dm-3 NaClO4 or NaN3) varying from 12.1 % retention of the t-configuration for X = NO3- in the absence of electrolyte to c. 26% for X = Me2SO in 1.0 mol dm-3 NaN3. Significantly more retention is observed in the azido products (75-80% t-[Co(tren)(NH3)N3]2+). The results are interpreted in terms of important contributions to the mechanism from pre-formed ion pairs.

Kinetics and mechanism of the aquation and base hydrolysis of the nitratopentaamminecobalt(III) ion and related complexes

1969 ◽  
Vol 8 (11) ◽  
pp. 2504-2508 ◽  
Author(s):  
William Edward Jones ◽  
Robert B. Jordan ◽  
T. W. Swaddle
Keyword(s):  
Kinetics And Mechanism ◽  
Base Hydrolysis ◽  
Hydrolysis Of
Sign in / Sign up

Export Citation Format

Share Document