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2 results on '"P. Dembech"'

1. On the nature and geometry of the ylidic intermediates in the methylation of six-membered ring sulfonium salts

Author

P. Fabbri, A. Garbesi, G. Barbarella, and P. Dembech

Subjects
Sulfonium, Organic Chemistry, chemistry.chemical_element, Methylation, Ring (chemistry), Photochemistry, Biochemistry, chemistry.chemical_compound, Deprotonation, chemistry, Drug Discovery, Polymer chemistry, Lithium, Carbon
Abstract

13C N.M.R. data indicate that different types of intermediates are generated by deprotonation of sulfonium salts with lithium bases viz almost ‘free’ or ‘tight-ion-pair’ ylids, with different geometries at the carbanionic carbon

Published
1982
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2. Carbon-13 NMR spectroscopy of sulfonium ylides

Author

P. Dembech, A. Garbesi, and G. Barbarella

Subjects
chemistry.chemical_compound, chemistry, Sulfonium, Organic Chemistry, Drug Discovery, chemistry.chemical_element, Carbon-13 NMR, Photochemistry, Spectroscopy, Biochemistry, Lithium Cation, Nmr data, Carbon
Abstract

C-13 NMR data for a series of stabilized and unstabilized ylides indicate flattening at the ylidic carbon with respect to the parent salts. For unstabilized ylides association between the carbanionic center and the lithium cation cannot be neglected.

Published
1980
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