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Conformational dependence of 17 O chemical shifts in 1,3‐dioxa‐2‐silacyclooctanes: Anomeric effect
Author(s) -
Kupče Ē.,
Liepiņš E.,
Zicmane I.,
Lukevics E.
Publication year - 1987
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.1260251214
Subject(s) - chemistry , anomer , anomeric effect , chemical shift , nmr spectra database , carbon 13 nmr , crystallography , spectral line , stereochemistry , chemical solution , nuclear magnetic resonance spectroscopy , physics , astronomy
17 O NMR spectra of 1,3‐dioxa‐2‐silacyclooctanes have been studied. The 17 O NMR signal of derivatives existing in the crown conformation is shifted downfield by 7–10 ppm relative to derivatives existing predominantly in conformations belonging to the boat–chair family. This shift is assumed to be due to the anomeric effect in 1,3‐dioxa‐2‐silacyclooctanes.