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Voinov, Maxim A.; Salnikov, Georgy E.; Genaev, Alexander M.; Mamatyuk, Victor I.; Shakirov, Makhmut M.; Grigor'ev, Igor A.
Magnetic resonance in chemistry, 11/2001, Letnik: 39, Številka: 11Journal Article
13C, 14N and 7Li NMR spectra of a lithiation product of the cyclic aldonitrone 1,2,2,5,5‐pentamethyl‐3‐imidazoline 3‐oxide were obtained. The 13C NMR spectrum of the lithiated particle exhibits the resonances of the C‐4 and C‐5 atoms (δ213 ppm and 73 ppm, respectively) shifted to high frequency relative to the signals of the corresponding nuclei of the starting nitrone (δC‐4 132 ppm and δC‐5 60 ppm). The 14N NMR spectrum of the particle shows the resonance of the N‐3 atom (−115 ppm) at lower frequency in comparison with −74 ppm for the starting nitrone. The calculated chemical shift changes are in good agreement with those observed experimentally. The electronic structure of the lithiated particle is discussed. Copyright © 2001 John Wiley & Sons, Ltd.
