Nitrogen-15 nuclear magnetic resonance shifts in liquid ammonia-15N-solvent mixtures

1969 ◽  
Vol 91 (24) ◽  
pp. 6574-6579 ◽  
Author(s):  
William M. Litchman ◽  
Mohammed Alei ◽  
Alan E. Florin
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Liquid Ammonia ◽  
Solvent Mixtures ◽  
Nuclear Magnetic

Solvation of the Sodium Ion. Quadrupolar Broadening of the 23Na Nuclear Magnetic Resonance

1972 ◽  
Vol 50 (24) ◽  
pp. 3935-3937 ◽  
Author(s):  
R. D. Green ◽  
John S. Martin
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Sodium Ion ◽  
Solvent Mixtures ◽  
Nuclear Magnetic

Sodium ion preferentially forms long lived complexes with dimethylsulfoxide or N,N-dimethylformamide, in mixtures of either of these solvents with either ethanenitrile or propanone. No long lived complexes are observed in solvent mixtures of water or methanol with ethanenitrile or propanone.

Reductive cleavage with metal in liquid ammonia. III. Olefin formation from the reaction of sodium metal with methyl 4,6-O-ethylidene-3-O,S-dimethyl-2-thio-α-d-altropyranoside dissolved in 1,2-dimethoxyethane

1967 ◽  
Vol 45 (15) ◽  
pp. 1767-1775 ◽  
Author(s):  
U. G. Nayak ◽  
M. Sharma ◽  
R. K. Brown
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Liquid Ammonia ◽  
Reductive Cleavage ◽  
Metallic Sodium ◽  
Sodium Metal ◽  
Infrared Data ◽  
Nuclear Magnetic

Methyl 4,6-O-ethylidene-3-O,S-dimethyl-2-thio-α-d-altropyranoside, when heated in refluxing 1,2-dimethoxyethane with an equimolar quantity of metallic sodium, gave approximately a 75% yield of a mixture of the three olefins, methyl 2,3-didehydro-3-deoxy-4,6-O-ethylidene-S-methyl-2-thio-α-d-altropyranoside (XI), l,2-didehydro-l-deoxy-4,6-O-ethylidene-3-O,S-dimethyl-2-thio-d-ribo-hexopyranose (XII), and methyl 3,4-didehydro-3-deoxy-4,6-O-ethylidene-S-methyl-2-thio-α-d-erythro(or threo)-hexopyranoside (XIII) (tentative). Only compounds XI and XII could be separated and characterized. The structural assignments were based on a comparison with authentic samples and on nuclear magnetic resonance and infrared data, as well as on a comparison with the characteristics of analogous 4,6-O-benzylidene compounds previously reported (2).

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