Date of Award
Master of Arts
Dr. Ralph K. Steinhaus
Dr. Dean W. Cooke
Dr. James A. Howell
Masters Thesis-Open Access
The reaction between N-(2-pyridylmethyl)iminodiacetatonickel(II) and copper(II) was studied spectrophotometrically between pH 2.30 and 3.30 over a 10-fold variation in copper concentration at an ionic strength of 1.25M, and a temperature of 25.0+0.1oC. The reaction is first order in both NiPyIDA and copper(II). Terms involving proton attack and a copper dependent dissociation of the nickel complex were resolved from the data. Evidence is given for a stepwise unwrapping mechanism PyIDA from the nickel complex, followed by copper attack to give a dinuclear intermediate. A general mechanism is presented which is consistent with the kinetic data.
Comparisons to analogous nickel-aliphatic exchange reactions with copper(II) are made and used to account for the important kinetic features of the reaction which involve the absence of an order shift in the copper concentration as the copper concentration is increased.
Beyene, "Kinetics of the Metal-Exchange Reaction between N-(2-Pyridylmethyl)Iminodiacetatonickel(N) and Copper(II)" (1987). Master's Theses. 1233.