## Recently , in an investigation of the poton nmr spectra of some arormtic dianions' it wus reported that the proton chemicrrl shifts did not correlate well with the electron density of the attached carbon atoms as has been observed in other arowtic systems. 2 It was suggested that the high field
β¦ LIBER β¦
Dynamic 7Li NMR investigation of dianionic dibenzotetraaza[14]annulene derivatives in solution
β Scribed by Hans Schumann
- Book ID
- 103654119
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 525 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0277-5387
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## Abstract ^13^C, ^14^N and ^7^Li NMR spectra of a lithiation product of the cyclic aldonitrone 1,2,2,5,5βpentamethylβ3βimidazoline 3βoxide were obtained. The ^13^C NMR spectrum of the lithiated particle exhibits the resonances of the Cβ4 and Cβ5 atoms (Ξ΄213 ppm and 73 ppm, respectively) shifted t