title: Substituent effects on 13C chemical shifts of alkyl-substituted 4-oxo-1,3-dioxolanes and 5-oxo-1,3-oxathiolanes.
abstract: The 13C NMR chemical shifts for 4-oxo-1,3-dioxolane (1) and its all methyl-substituted derivatives (2-10) as well as for 5-oxo-1,3-oxathiolane (11) and its nine alkyl-substituted derivatives (12-20) are reported. The magnitude and variety of the substituent effects are in accordance with the envelope conformations in which the oxygen or sulfur atom locates at the tip of the envelope as postulated on the basis of earlier data.
authors: Department of Chemistry, University of Turku, FI-20014 Turku, Finland. kpihlaja@utu.fi
authors: Kalevi
authors: K
authors: Pihlaja
authors: Kyllikki
authors: K
authors: Rossi
authors: Timo
authors: T
authors: Nurmi