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Carbon-13 and related NMR chemical shifts in alkylammonium and alkylphosphonium salts (1990)

Evans, David J. ; Leigh, G. Jeffery ; Macdonald, Colin J.

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 28 (1990), S. 711-714

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ISSN: 0749-1581

Keywords: Alkylammonium salts ; Alkylphosphonium salts ; Iron-sulphur cluster ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The 13C NMR chemical shifts of the α-carbon atoms in cations [NR4]+, [NR3CH2Ph]+ and [PR4]+ [R = Me, Et, Prn, Bun or Pen (n-pentyl)] are found at anomalously high field in comparison with the corresponding shifts in RCl or RNH2. This is ascribed in part to the effect of the positive charge. The effect is detectable but less pronounced with β-carbon atoms, but is not detectable in subsequent carbon atoms in longer alkyl chains.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/mrc.1260280810

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