OZEANO HMXLIA (Bologna)-ITALY C-13 NMB data for a series of stabilized and unstabilized ylides indicate flattening at the ylidic carbon with respect to the Parent salts. For unst\*ilired ylides association between the oarbanionic center and the lithium cation cannot be neglected. Sulfunium yfides ar
NMR spectra and protolysis of stable sulfonium ylides
โ Scribed by Stephen H. Smallcombe; Robert J. Holland; Richard H. Fish; Marjorie C. Caserio
- Publisher
- Elsevier Science
- Year
- 1968
- Tongue
- French
- Weight
- 254 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
Several papers have appeared recently dealing with the nmr spectra and chemical exchange processes of phosphonium ylides (1,2,3,4).
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## Abstract ^33^S NMR chemical shifts were calculated by the scaled DFT and EMPI approaches for the fluoride, chloride and bromide of trimethylsulfonium ion (1) and __S__โmethyltetrahydrothiophenium ion (2), in addition to the free cations. Experimental values were obtained for the iodides of 1 (ฮด