The metal exchange reaction between NiMIDA and copper(II)
The metal exchange reaction between copper(II) and N-methyliminodiacetatonickelate(II) (NiMIDA) was studied at 25.0°C and ionic strength of 1.25 within the pH range 3.5 to 4.8. The copper(II) to NiMIDA concentration ratio was varied over a two-hundred-fold range. The reaction is first-order in NiMIDA, copper(II) and hydrogen ion. The rate constant for the addition of copper(II) to NiMIDA is = 5.10 × 10−3 M−1 s−1. The rate constants for both the hydrogen ion dependent- and independent- dissociations of NiMIDA are, respectively, = 0.400 M−1 s−1 and k NiMIDA = 7.76 × 10−5 s−1. A mechanisim is presented which shows that MIDA does not prevent formation of a dinuclear intermediate and that MIDA partly unwraps from nickel before reacting with copper(II).
Link to Published Version
Kolopajlo, L. (2006). The metal exchange reaction between NiMIDA and copper(II). Journal of Coordination Chemistry, 59(8), 891–899. doi:10.1080/00958970500437997