Date of Award
Master of Arts
Dr. Ralph K. Steinhaus
Dr. Michael McCarville
Dr. James A. Howell
Masters Thesis-Open Access
The reaction between copper(II) and N -(2-hydroxyethyl)iminodiacetatonickelate( II) (NiHEIDA) was studied between pH 4.0 and 5.6 over a 70 fold variation in copper concentration at an ionic strength of 1.25 and a temperature of 25° C. The reaction order in both NiHEIDA and Cu(U) is first. The reaction rate is pH sensitive and a hydrogen dependent pathway as w ell as copper dependent and copper and hydrogen independent pathways were found.
Evidence is given for a stepwise mechanism for the unwrapping of HEIDA from its nickel complex, follow ed by copper attack to give a dinuclear intermediate, which then breaks up to products. The first-order copper rate constant can be predicted from the stability of the dinuclear intermediate. No pronounced effect could be assigned to the hydroxyethyl segment of HEIDA reacting with either the incoming copper ion or the leaving nickel ion.
Weed, "The Kinetics of the Metal Exchange Reaction between N-(2-Hydroxyethyl) Iminodiacetatonickelate (Il) and Copper(II)" (1984). Master's Theses. 1538.