An even more pronounced effect is observed in the 13C NMR spectra of spiro steroids. Signals of axial carbon atoms [(C(aJ are shifted upfield by 1.2-6.6 ppm compared with the respective signal of equatorial carbons [(C(a,,)] of the same type (Tables 2 and3). The only exception is the pair of compoun
Multinuclear Magnetic Resonance (1H, 11B, 13C, 15N and 205Tl) Study of Thallium Hydridotris(3,5-dimethylpyrazol-1-yl)borate
✍ Scribed by D. Sanz; R. M. Claramunt; J. Glaser; S. Trofimenko; J. Elguero
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 271 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
One of the frequently used ligands, hydridotris(3,5-dimethylpyrazol-1 -yl) borate, and its thallium complex were fully characterized by multinuclear NMR. New 16N,20'T coupling constants were measured. A dynamic process, with an activation energy of 65 kJ mol-', which corresponds to the nitrogen-thallium bond breaking, is observed in these compounds.
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## Abstract Multinuclear magnetic resonance studies (^1^H, ^13^C, ^15^N, ^31^P) of three phosphorus–nitrogen compounds [__tert__‐butylamino‐__tert__‐butylfluorophosphane (1), __tert__‐butylimino‐__tert__‐butylphosphane (2) and its dimer (3)], in which numerous one‐ and two‐dimensional NMR experimen