Conformational Equilibria in Cyclic Sulfites and Sulfates. The Configurations and Conformations of the Two Isomeric Thiodans1

1965 ◽  
Vol 30 (1) ◽  
pp. 169-175 ◽  
Author(s):  
Sylvan E. Forman ◽  
Antony J. Durbetaki ◽  
Michael V. Cohen ◽  
R. A. Olofson
Keyword(s):  
Conformational Equilibria ◽  
Cyclic Sulfites

Temperature Dependence of the Conformational Equilibria of Cyclic Sulfites

1965 ◽  
Vol 30 (12) ◽  
pp. 4363-4364 ◽  
Author(s):  
C. G. Overberger ◽  
T. Kurtz ◽  
S. Yaroslavsky
Keyword(s):  
Temperature Dependence ◽  
Conformational Equilibria ◽  
Cyclic Sulfites

ChemInform Abstract: THE CONFORMATIONAL ANALYSIS OF SATURATED HETEROCYCLES PART 56, SUBSTITUENT EFFECTS IN THE CONFORMATIONAL EQUILIBRIA OF SPIRO-OXAZOLINES

1974 ◽  
Vol 5 (20) ◽  
pp. no-no
Author(s):  
RICHARD A. Y. JONES ◽  
ALAN R. KATRITZKY ◽  
KEITH A. F. RECORD ◽  
ROGER SCATTERGOOD ◽  
JOHN M. SULLIVAN
Keyword(s):  
Conformational Analysis ◽  
Substituent Effects ◽  
Conformational Equilibria ◽  
Saturated Heterocycles

CONFORMATIONAL EQUILIBRIA IN OPEN-CHAIN α,β-UNSATURATED KETONES

1961 ◽  
Vol 39 (11) ◽  
pp. 2225-2235 ◽  
Author(s):  
K. Noack ◽  
R. Norman Jones
Keyword(s):  
Raman Spectra ◽  
Equilibrium Mixture ◽  
Infrared And Raman Spectra ◽  
Temperature Dependent ◽  
Trans Form ◽  
Open Chain ◽  
Unsaturated Ketones ◽  
Conformational Isomers ◽  
Alkyl Substitution ◽  
Conformational Equilibria

The infrared and Raman spectra of trans-Δ3-penten-2-one have been measured over the temperature range +30° to −75° and +85° to +5° respectively. The temperature-dependent changes observed in the spectra indicate that this ketone exists as an equilibrium mixture of s-cis and s-trans conformational isomers in the liquid state. The s-trans form is the more stable and is present exclusively in the crystalline solid.Similar measurements have been carried out on Δ3-buten-2-one. The infrared and Raman spectra of this ketone also exhibit temperature effects that can be explained by a similar equilibrium, though the evidence is not as conclusive as for trans-Δ3-penten-2-one.The influence of alkyl substitution at the α- and β-carbon atoms on the relative stability of the s-cis and s-trans forms of α,β-unsaturated ketones is discussed.

The influence of sulfur configuration in1H NMR chemical shifts of diasteromeric five-membered cyclic sulfites

2016 ◽  
Vol 55 (3) ◽  
pp. 233-238 ◽  
Author(s):  
Marco A. Obregón-Mendoza ◽  
Mariano Sánchez-Castellanos ◽  
Gabriel Cuevas ◽  
Dino Gnecco ◽  
Julia Cassani ◽  
...  
Keyword(s):  
Chemical Shifts ◽  
Nmr Chemical Shifts ◽  
Cyclic Sulfites
Sign in / Sign up

Export Citation Format

Share Document