Abstract
The equilibrium dynamics in aqueous solutions of copper(II)-glycine system have been investigated by measuring the transverse relaxation time of water protons in a wide concentration range. The use of a general method is illustrated to represent the paramagnetic contribution of the multi-site exchange processes involving paramagnetic site(s) to the measured relaxation time of water protons. It has been experimentally verified that the −NH 2 ⇌ H 2O proton exchange may be the rate determining step in transferring the effect of paramagnetic relaxation to the measured relaxation time of water protons. The rate constants for the G − + H 2O ⇌ HG ± + OH − and for the G o − + HG ± ⇌ H G o ± + G − protonexchanges are determined. It is shown that the rate constants of the CuG 2 + G o − k 2 CuG G o + G − and ▪ processes could not be determined individually; only their combination of 3k 2 + 2k −3 can be given. A suggestion for the mechanism of the ligand exchange is put forward.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call