Sulphur-33 nuclear magnetic resonance spectroscopy of sulphones

1986 ◽  
Vol 64 (8) ◽  
pp. 1581-1584 ◽  
Author(s):  
Jeffrey Hoyle ◽  
J. Stuart Grossert ◽  
Donald L. Hooper ◽  
Subramanian Sotheeswaran
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Resonance Spectroscopy ◽  
Half Height ◽  
Ammonium Sulphate Solution ◽  
Half Height Width

The sulphur-33 nmr spectra of 28 sulphones were measured in deuterochloroform solutions at 27.716172 MHz. The spectra were referenced with respect to an external aqueous ammonium sulphate solution and the chemical shifts lay in the range 0 ± 20 ppm, with many lines having a half-height width of less than 200 Hz. Instrumental parameters that affect the spectra were studied. Some of the sulphur-33 resonances can be correlated well with carbon-13 or oxygen-17 resonances in appropriate analogous compounds, and with the Taft σ* parameter.

Studies of specifically fluorinated carbohydrates. Part II. Nuclear magnetic resonance studies of pentopyranosyl fluoride derivatives

1969 ◽  
Vol 47 (1) ◽  
pp. 19-30 ◽  
Author(s):  
L. D. Hall ◽  
J. F. Manville
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Chemical Shifts ◽  
Coupling Constants ◽  
Resonance Spectroscopy ◽  
Magnetic Resonance Studies ◽  
Conformational Model ◽  
Nuclear Magnetic

Detailed studies, by 1H and 19F nuclear magnetic resonance spectroscopy, of a series of fully esterified pentopyranosyl fluorides, show that all such derivatives favor that conformer in which the fluorine substituent is axially oriented. This conclusion is supported by separate considerations of the vicinal and geminal19F–1H and 1H–1H coupling constants, of the long-range (4J) 1H–1H and 19F–1H coupling constants and of the 19F chemical shifts. The limitations of the above conformational model are discussed.

Synthesis of Polycationic Aza-Belted Heterocyclic Iodomethane Salts

2019 ◽  
Vol 11 (11) ◽  
pp. 1134-1141
Author(s):  
Yan-Yan Wang ◽  
Tuan-Jie Wang ◽  
Juan Chen ◽  
Chao-Yang Wang ◽  
Jing Zhu
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Functional Groups ◽  
Chemical Shifts ◽  
Resonance Spectroscopy ◽  
Reaction Conditions ◽  
13C Nuclear Magnetic Resonance ◽  
Judicious Choice

Novel belt shapes of a diazabicyclo[n,n,5.5]alkane center combined with double iodomethane salts were prepared in two steps by a reaction of phenylethylamine or 3,4-dimethoxyphenylethylamine with ortho-bis(chloromethyl)benzenes. The syntheses and characteristics of these polycationic systems containing aza-belt rings are described. Judicious choice of the reaction conditions allowed these polycationic heterocycles to be generated in good yields, and 1H and 13C nuclear magnetic resonance spectroscopy revealed a change in chemical shifts caused by interactions between the functional groups.

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