NMR investigation of dynamic processes in complexes of nickel(II) and zinc(II) with iminodiacetate, n-methyliminodiacetate and n-ethyliminodiacetate
Analysis of oxygen-17 bulk water relaxation rates with an aqueous solution of 1:1 Ni(II):ida reveals that two rate-limiting processes are involved with solvent exchange. Analysis of carbon-13 longitudinal relaxation rates of the bis-ligand complexes with zinc(II) are used to determine molecular tumbling rates and methyl rotation rates. The carbon-13 transverse relaxation rates for the carbons in the bis-ligand complex with Ni(II) are adequately fitted to the Solomon-Bloembergen equation. Three carboxylate carbon peaks are seen with the /sup 13/C spectrum of the 1:2 Ni(II):ida complex, which coalesce into a single peak above about 360 K. The mechanism and rate of ligand exchange are determined for the complexes Zn(II)L/sub 2//sup -2/ (L = mida, eida) in aqueous solution by total lineshape analysis of the proton spectrum at 500 MHz.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5982240
- Report Number(s):
- LBL-20850; ON: DE86007493
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
CARBON 13
CARBON ISOTOPES
COMPLEXES
ENERGY LEVELS
EVEN-ODD NUCLEI
EXCITED STATES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MOLECULAR STRUCTURE
NICKEL COMPLEXES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ORGANIC COMPOUNDS
OXYGEN 17
OXYGEN ISOTOPES
PEAKS
RESONANCE
ROTATIONAL STATES
STABLE ISOTOPES
TRANSITION ELEMENT COMPLEXES
ZINC COMPLEXES