The electronic effect of substituted methyl groups. A carbon-13 nuclear magnetic resonance study

1976 ◽  
Vol 41 (9) ◽  
pp. 1498-1504 ◽  
Author(s):  
William. Adcock ◽  
B. D. Gupta ◽  
William. Kitching
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Electronic Effect ◽  
Nuclear Magnetic Resonance Study ◽  
Methyl Groups ◽  
Magnetic Resonance Study ◽  
Nuclear Magnetic

A13C nuclear magnetic resonance study of thiolane sulfoxides. The configurations of neothiobinupharidine sulfoxides

1976 ◽  
Vol 54 (24) ◽  
pp. 3860-3868 ◽  
Author(s):  
R. T. LaLonde ◽  
C. F. Wong ◽  
A. I-M. Tsai ◽  
J. T. Wróbel ◽  
J. Ruszkowska ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Study ◽  
Methyl Groups ◽  
Magnetic Resonance Study ◽  
Trans Methyl ◽  
C Nmr ◽  
Nuclear Magnetic

The sulfoxide configurations of neothiobinupharidine α- and β-sulfoxides have been determined through a 13C nmr investigation. The 13C nmr sulfoxidation increments (ΔδC-i = δC–iS–O − δC–iS) for all carbons in 2,2,4,4-tetramethylthiolane sulfoxide have been determined, Sulfoxidation increments for the C-2 methyl groups, the indicator carbons, were found to be similar in sign and magnitude to the increments reported for methyl groups in penicillin sulfoxides, wherein methyl groups cis to the sulfoxide oxygen show larger sulfoxidation increments than do the trans methyl groups. The sign and magnitude of the sulfoxidation increments for C-6 and C-8, the indicator carbons in the neothiobinupharidine sulfoxides, have been determined and compared with those of the model 2,2,4,4-tetramethylthiolane and those of the penicillins. The C-6 increments were −9.9 and −5.6 ppm respectively for the solid and liquid neothiobinupharidine sulfoxide. Therefore the solid sulfoxide is assigned the β-configuration and the liquid sulfoxide the α-configuration as a result of these studies.

High resolution nuclear magnetic resonance study of the mobility in solid cryolite, Na3AlF6, from room temperature up to 300 °C

1998 ◽  
Vol 95 (2) ◽  
pp. 322-326 ◽  
Author(s):  
V. Lacassagne ◽  
C. Bessada ◽  
D. Massiot ◽  
P. Florian ◽  
J.-P. Coutures
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Room Temperature ◽  
Nuclear Magnetic Resonance Study ◽  
Magnetic Resonance Study ◽  
Nuclear Magnetic

ChemInform Abstract: CARBON-13 NUCLEAR MAGNETIC RESONANCE STUDY OF OSMIUM COMPLEXES OF THE TYPE (OS3(CO)10H(X))

1978 ◽  
Vol 9 (22) ◽  
Author(s):  
E. G. BRYAN ◽  
A. FORSTER ◽  
B. F. G. JOHNSON ◽  
J. LEWIS ◽  
T. W. MATHESON
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Study ◽  
Magnetic Resonance Study ◽  
Osmium Complexes ◽  
Nuclear Magnetic
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