Solid-state sup 31 P NMR studies of mercury(II) phosphonates. Anisotropies of the sup 31 P chemical shift and the sup 31 P minus sup 199 Hg indirect spin-spin coupling
- Dalhousie Univ., Halifax, Nova Scotia (Canada)
The {sup 31}P powder NMR line shapes of a number of solid mercury(II) phosphonates are analyzed in order to determine the anisotropies in both the {sup 31}P chemical shift and the {sup 31}P{minus}{sup 199}Hg indirect spin-spin coupling. The magnitudes and orientation of the principal components of the {sup 31}P chemical shift tensor are determined for diethyl N-phenylphosphoramidate, (EtO){sub 2}P(O)NHPh, by using dipolar-chemical shift NMR spectroscopy. Spectral simulations indicate that the most shielded component of the {sup 31}P chemical shift tensor lies along the P{double bond}O plane. This information is used to interpret the {sup 31}P NMR line shapes for a series of mercury phosphonate complexes. These spectra indicate the presence of substantial anisotropies in the {sup 31}P{minus}{sup 199}Hg indirect spin-spin (J) coupling, ranging from 1,500 to 2,700 Hz. The large anisotropies in J indicate that mechanisms other than the Fermi contact contribute to the electron-mediated communication between {sup 31}P and {sup 199}Hg. 47 refs., 4 figs., 2 tabs.
- OSTI ID:
- 6105773
- Journal Information:
- Inorganic Chemistry; (United States), Vol. 30:15; ISSN 0020-1669
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MERCURY COMPOUNDS
MOLECULAR STRUCTURE
PHOSPHONATES
ANISOTROPY
CHEMICAL SHIFT
EXPERIMENTAL DATA
MERCURY 199
NMR SPECTRA
PHOSPHORUS 31
DATA
EVEN-ODD NUCLEI
HEAVY NUCLEI
INFORMATION
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LIGHT NUCLEI
MERCURY ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORUS ISOTOPES
RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
400201* - Chemical & Physicochemical Properties
400202 - Isotope Effects
Isotope Exchange
& Isotope Separation