Observation of nitrogen-14, carbon-13 indirect spin-spin coupling in high-resolution 13C CP/MAS spectra of solids.
The 13C CP/MAS NMR spectrum of [(n-C3H7)4N][Cd(SCN)3], 1, indicates the presence of three non-equivalent thiocyanate ligands, in agreement with the results of a recent single-crystal X-ray diffraction study. Examination of the 13C MAS line shapes allows direct measurement of the indirect spin-spin coupling constants, 1J(14N, 13C) = 16 +/- 1 Hz and 2J(111/113Cd, 13C) = 75 +/- 5 Hz, for the unique N-bonded thiocyanate ligand. This is the first reported measurement of 1J(14N, 13C) and 2J(111/113Cd, 13C) in the solid state. Possible reasons for the failure to observe 1J(14N, 13C) values in previous high-resolution 13C CP/MAS NMR studies are summarized.
Department of Chemistry, Dalhousie University, Halifax, N.S., Canada.
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K
Eichele
R E
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Wasylishen
D002244:Carbon / Q000737:chemistry*; D002247:Carbon Isotopes; D003460:Crystallization; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry*; D013861:Thiocyanates / Q000737:chemistry
D002247:Carbon Isotopes; D008024:Ligands; D013861:Thiocyanates; D002244:Carbon; D009584:Nitrogen