Carbon-13 magnetic resonance shifts in triscyclopentadienyl uranium(IV) chloride
β Scribed by Eiichi Fukushima; Samuel D. Larsen
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 339 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Carbon-l 3 NMR shift of (CsH& UCI in THT: for 160 Z T r; 320 K consists of a Curie-Weiss part with a Weiss tempcnturc of 140 f 10 K and a temperature-independent part of i-59 ppm with respect to TMS. The contact shift is -309 C 120 ppm at 290 K and is larger than the pseudocontact shift by about a factor of two.
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A major problem in the use of i3C-NMR spectroscopy for structure identification is to estimate the 13C shifts of compounds known or suspected to be present in the spectrum. The substituent chemical shifts of different functional groups were studied and new, detailed empirical rules are reported. Tre
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