Spectroscopic studies of ionic solvation. XXI. A raman, infrared, and NMR study of sodium perchlorate solutions in nonaqueous solvents

1976 ◽  
Vol 5 (9) ◽  
pp. 653-665 ◽  
Author(s):  
Mark S. Greenberg ◽  
Alexander I. Popov
Keyword(s):  
Sodium Perchlorate ◽  
Spectroscopic Studies ◽  
Nonaqueous Solvents ◽  
Ionic Solvation ◽  
Nmr Study

Spectroscopic studies of ionic solvation. XX. Cesium-133 NMR study of cesium salts in different solvents

1977 ◽  
Vol 6 (5) ◽  
pp. 337-348 ◽  
Author(s):  
Wayne J. DeWitte ◽  
Lulu Liu ◽  
Elizabeth Mei ◽  
James L. Dye ◽  
Alexander I. Popov
Keyword(s):  
Spectroscopic Studies ◽  
Ionic Solvation ◽  
Nmr Study ◽  
Cesium Salts

Spectroscopic studies of ionic solvation in propylene carbonate

1973 ◽  
Vol 77 (20) ◽  
pp. 2407-2410 ◽  
Author(s):  
Howard L. Yeager ◽  
John D. Fedyk ◽  
Richard J. Parker
Keyword(s):  
Propylene Carbonate ◽  
Spectroscopic Studies ◽  
Ionic Solvation

Spectroscopic studies of ionic solvation—XV

1973 ◽  
Vol 29 (11) ◽  
pp. 1927-1932 ◽  
Author(s):  
Mark S. Greenberg ◽  
Diana M. Wied ◽  
Alexander I. Popov
Keyword(s):  
Spectroscopic Studies ◽  
Ionic Solvation

Spectroscopic studies of ionic solvation in pyridine solutions

1970 ◽  
Vol 74 (3) ◽  
pp. 535-537 ◽  
Author(s):  
William J. McKinney ◽  
Alexander I. Popov
Keyword(s):  
Spectroscopic Studies ◽  
Ionic Solvation

Spectroscopic studies of the electrophilic activation of amides with triflic anhydride and pyridine

2001 ◽  
Vol 79 (11) ◽  
pp. 1694-1703 ◽  
Author(s):  
André B Charette ◽  
Michel Grenon
Keyword(s):  
Spectroscopic Studies ◽  
Initial Reaction ◽  
Spectroscopic Techniques ◽  
Nmr Study ◽  
Acidic Conditions ◽  
Electrophilic Activation ◽  
Tertiary Amides ◽  
Secondary Amides

The reaction of amides with trifluoromethanesulfonic (triflic) anhydride in the presence of pyridine was thoroughly investigated by NMR spectroscopic techniques. Different pyridinium intermediates were generated from secondary amides, tertiary amides with enolizable protons, and tertiary amides lacking enolizable protons. It was found that the actual triflating reagent is N-(trifluoromethylsulfonyl)pyridinium triflate 11 which is formed by the initial reaction of triflic anhydride with pyridine. The alcoholysis of these intermediates yields O-alkyliminium ethers which can then be easily hydrolyzed under mild acidic conditions to the corresponding esters.Key Words: amides, triflic anhydride, pyridinium intermediates, NMR study.

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