Zinc-67 NMR study of zinc ions in water and in some nonaqueous and mixed solvents
Solutions of zinc salts in water, methanol (MeOH), dimethylformamide (DMF) and binary mixtures of water with the two nonaqueous solvents were studied by zinc-67 MNR measurements. Anhydrous zinc nitrate solutions in DMF and MeOH show upfield, concentration independent, chemical shifts at -27 and -19 ppm, respectively, vs. the aqueous solution standard. Addition of DMF or MeOH to an aqueous solution of a zinc salt results in a diamagnetic shift but for the addition of acetonitrile a paramagnetic shift results. In all cases the signal was broadened very considerably, e.g., in ZnCl/sub 2/ solution the linewidth increased from --40 to --600 Hz in going from water to 35% aqueous MeOH. Both /sup 67/ Zn and /sup 13/ C NMR failed to show any complexation of Zn/sup 2/+ ion by crown ethers in aqueous solution. A gradual addition of EDTA, of diaza-18-crown-6 or of tetraazacyclotetradecane resulted in an immediate broadening of the /sup 67/ Zn signal which became undetectable when one equivalent of a ligand was added.
- Research Organization:
- Dept. of Chem., Michigan State Univ.
- OSTI ID:
- 6435210
- Journal Information:
- J. Solution Chem.; (United States), Journal Name: J. Solution Chem.; (United States) Vol. 11:1; ISSN JSLCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400104* -- Spectral Procedures-- (-1987)
ALCOHOLS
AMIDES
AQUEOUS SOLUTIONS
BINARY MIXTURES
CHEMICAL SHIFT
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
ELEMENTS
EVEN-ODD NUCLEI
FORMAMIDE
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LINE WIDTHS
MAGNETIC RESONANCE
METALS
METHANOL
MIXTURES
NITRATES
NITROGEN COMPOUNDS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
REAGENTS
RESONANCE
SOLUTIONS
SOLVENTS
SPECTRA
STABLE ISOTOPES
WATER
ZINC
ZINC 67
ZINC CHLORIDES
ZINC COMPOUNDS
ZINC HALIDES
ZINC ISOTOPES
ZINC NITRATES