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13C nuclear magnetic resonance and conformational analysis of 5-chloro-2-oxo-1,3,2-dioxathianes (1983)

Gorrichon, Jean-Pierre ; Chassaing, Gérard ; Cazaux, Louis

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 21 (1983), S. 426-428

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ISSN: 0030-4921

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The 13C NMR chemical shifts in CDCI3 for eight cyclic sulphites, chlorinated at C-5, are reported. The α-and β-deshielding effects and the γ-shielding effects for the chlorine substituent are compared with similar effects in the 1,3-dioxane series and with the effects arising from methyl groups in the sulphite series. The study of two conformational equilibria shows that it is difficult to use 13C NMR spectroscopy for the conformational analysis of cyclic sulphites because of the frequent participation of twist forms, with 1,4- and 2,5-axes, to these equilibria.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/omr.1270210705

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