Structural study of four Ca@C82 isomers by 13C NMR spectroscopy
β Scribed by Takeshi Kodama; Ryosuke Fujii; Yoko Miyake; Koichi Sakaguchi; Hiroyuki Nishikawa; Isao Ikemoto; Koichi Kikuchi; Yohji Achiba
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 167 KB
- Volume
- 377
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The 13 C NMR spectra of four Ca@C 82 isomers have been measured. The symmetry of isomers I, II, III, and IV are assigned to be C s , C 3v , C 2 , and C 2v , respectively. For isomer IV, the cage is specified to be C 2v (9).
π SIMILAR VOLUMES
3 a ) and (3c) or (Sf) formed as minor products on reaction ( I ) with methyl acryiate or methyl propiolate were synthesized isomer-free from the diester (1') and characterized. The data for the compounds prepared are summarized in Table .
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## Abstract The ^13^C NMR chemical shifts of nine acetoxyxanthones are reported and identified. The acetoxy substituent effects have been evaluated and the corresponding shift increments proposed.