33 S NMR spectra of sulfonium salts: calculated and experimental | Zendy

Dickinson L. Charles | Zendy; Chesnut Donald B. | Zendy; Quin Louis D. | Zendy

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33 S NMR spectra of sulfonium salts: calculated and experimental

Author(s) -

Dickinson L. Charles,

Chesnut Donald B.,

Quin Louis D.

Publication year - 2004

Publication title -

magnetic resonance in chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0749-1581

DOI - 10.1002/mrc.1473

Subject(s) - chemistry , sulfonium , bromide , iodide , ion , chloride , fluoride , nmr spectra database , chemical shift , inorganic chemistry , analytical chemistry (journal) , spectral line , computational chemistry , organic chemistry , salt (chemistry) , physics , astronomy

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 ‐methyltetrahydrothiophenium ion (2), in addition to the free cations. Experimental values were obtained for the iodides of 1 (δ +48, CS 2 = 0 ppm) and 2 (δ +95), and were found to agree with the calculated values well within the standard deviation of 35 ppm (3.5% of the shielding range) established in earlier work for a great variety of sulfur compounds. An earlier literature value of δ +750 for the iodide of 2 is therefore to be replaced. Calculations provide a shift of δ +68 for S ‐methylthianium ion with equatorial methyl, indicating that the reported value of δ +670 for the iodide is also incorrect. Copyright © 2004 John Wiley & Sons, Ltd.

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