ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

Kinetics of the substitution reactions of chromium(III) complexes. II. Aquation of dibromotetra-aquochromium(III) and bromopenta-aquochromium(III) ions

V. Holba, M. Dillinger, and G. Čunderlíková

Komenský University, Bratislava

 

Abstract: cf. CA 62, 1118d. Kinetics of the aquation of [CrBr2(H2O)4]+ and of [CrBr(H2O)5]2+ in relation to pH were studied. There are 2 reactions, (A) [CrBr2(H2O)4]+ + H2O →k [CrBr(H2O)5]2+ + Br- and (B) [CrBr(H2O)5]2+ + H2O →k [Cr(H2O)6]3+ + Br-. The liberated Br- were detd. by potentiometric titration with 0.01N AgNO3 and measured by a spectrophotometric method. In (A) the pH range was 1.0-2.0, temp. 15°, and the kinetic const. was k[min.-1] = 1.60 × 10-2 + 5.39 × 10-4/[H+]. In (B) the pH range was 1.80-3.13, temp. 25° and the kinetic const. was k[min.-1] = 1.20 × 10-2 + 5.61 × 10-5/[H+]. It is evident from these equations that the conjugated base reacts more rapidly than the original complex ion and that it contributes to the total reaction rate.

Full paper in Portable Document Format: 1811a823.pdf (in Slovak)

 

Chemical Papers 18 (11) 823–829 (1964)

Tuesday, June 25, 2024

IMPACT FACTOR 2023
2.1
SCImago Journal Rank 2023
0.381
SEARCH
Advanced
VOLUMES
© 2024 Chemical Papers