Multinuclear magnetic resonance study of the bis-iminodiacetate nickel(II) complex in aqueous solution
Proton, carbon-13, and oxygen-17 NMR spectra of the bis-iminodiacetate nickel (II) complex are reported and interpreted in terms intramolecular cis/trans isomer racemization and carboxylate oxygen interchange. Proton NMR spectra at 60 mHz and 180 mHz are consistent with previously reported spectra. Carbon-13 NMR spectra unambiguously determine the cis/trans isomer ratio. The temperature dependence of the carbon-13 NMR spectra shows no evidence of intermolecular ligand exchange between the complex and the free ligand, in contast to simple amino acid complexes. Carbon-13 NMR spectra suggest that cis/trans isomer interconversion occurs via a Bailar-twist mechanism. 45 refs., 9 figs., 10 tabs.
- Research Organization:
- California Univ., Berkeley (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5161702
- Report Number(s):
- LBL-21483; ON: DE87000080
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AQUEOUS SOLUTIONS
CARBON 13
CARBON ISOTOPES
CHEMICAL SHIFT
COMPLEXES
DISPERSIONS
EVEN-ODD NUCLEI
HYDROGEN COMPOUNDS
ISOMERS
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MIXTURES
NICKEL COMPLEXES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
OXYGEN 17
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PROTON SPECTRA
RESONANCE
SOLUTIONS
SOLVENT PROPERTIES
SPECTRA
STABLE ISOTOPES
TRANSITION ELEMENT COMPLEXES
VISCOSITY
WATER