The Carbon-13 Magnetic Resonance Spectrum of Propane

1974 ◽  
Vol 52 (18) ◽  
pp. 3247-3250 ◽  
Author(s):  
Roderick E. Wasylishen ◽  
Ted Schaefer
Keyword(s):  
Magnetic Resonance ◽  
Isotope Shift ◽  
High Field ◽  
Resonance Spectrum ◽  
Deuterium Isotope Shift ◽  
Magnetic Resonance Spectra

The carbon-13 magnetic resonance spectra of propane and of propane-2,2-d2 are analyzed to give 1j(13C1,H) = 124.35, 1J(13C2,H) = 125.35, 2J(13C1,H) = −4.25, 2J(13C2,H) = −4.39, 3J(13C,H) = 5.80, 3J(H,H) = 7.375, 4j(H,H) < ± 0.18 Hz. The deuterium isotope shift at C2 is 0.72 ± 0.10 p.p.m. to high field.

Further reactions of secondary amines and arsines with fluorocycloolefins

1967 ◽  
Vol 45 (7) ◽  
pp. 719-724 ◽  
Author(s):  
W. R. Cullen ◽  
P. S. Dhaliwal
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Field ◽  
Secondary Amines ◽  
Nuclear Magnetic Resonance Spectra ◽  
Simple Product ◽  
Dialkylamino Group ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The generality of the reaction [Formula: see text] has been investigated, and examples are given when M = N, X = F or Cl, Y = F, Cl, H, or As(CH3)2, and n = 1, 2, or 3; and when M = As, X = F or Cl, Y = F, Cl, H, or C2H5, and n = 1 or 2. When M = N, Y = OCH3, and X = Cl, the butenone [Formula: see text] is obtained; the corresponding reaction with (CH3)2AsH gives only a trace of a butenone. When M = N, Y = C2H5, X = Cl, and n = 1, the simple product is not obtained. The nuclear magnetic resonance spectra of the compounds [Formula: see text] (Y = H or F) show similar features, notably a shift to high field of the Y resonance when Z is a dialkylamino group.

The Proton Magnetic Resonance Spectrum and Structure of Himgravine

1961 ◽  
Vol 14 (1) ◽  
pp. 64 ◽  
Author(s):  
RJ Abraham ◽  
HJ Bernstein
Keyword(s):  
Magnetic Resonance ◽  
High Resolution ◽  
Proton Magnetic Resonance ◽  
Resonance Spectrum ◽  
Proton Magnetic Resonance Spectrum ◽  
Relative Orientation ◽  
Other Information ◽  
Magnetic Resonance Spectra

The high resolution proton magnetic resonance spectra of himgravine and himbacine have been obtained in CHCl3 solution at 60 Mc/s. The spectra are consistent with only one of the two possible structures proposed. Other information with regard to relative orientation of groups within the molecule has also been obtained.

PROTON MAGNETIC RESONANCE SPECTROSCOPY AND THE SULPHATION OF LINEAR AND BRANCHED DEXTRAN

1963 ◽  
Vol 41 (3) ◽  
pp. 777-782 ◽  
Author(s):  
W. M. Pasika ◽  
L. H. Cragg
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectrum ◽  
Chain Scission ◽  
Proton Magnetic Resonance Spectrum ◽  
Resonance Spectroscopy ◽  
Peak Areas ◽  
Magnetic Resonance Spectra

The introduction of sulphate groups into dextran produces characteristic changes in its proton magnetic resonance spectrum. With linear dextran a new signal appears which can be attributed solely to an effect of sulphate groups; with branched dextran this signal coincides with that due to the branching. From a comparison of peak areas in these spectra with peak areas in the spectra of the unsulphated linear and branched dextrans it is concluded that during sulphation no appreciable degradation occurred, whether by chain scission or branch hydrolysis.The proton magnetic resonance spectra also provide evidence for preferential substitution of sulphate at carbon 2 in the anhydroglucose unit.

Cancentrine. V. The 13C magnetic resonance spectra of cancentrine and some derivatives; the structure of 10-oxocancentrine

1978 ◽  
Vol 56 (18) ◽  
pp. 2467-2471 ◽  
Author(s):  
Herbert L. Holland ◽  
Donald W. Hughes ◽  
David B. MacLean ◽  
Russell G. A. Rodrigo
Keyword(s):  
Magnetic Resonance ◽  
Spectral Data ◽  
Methyl Ether ◽  
Resonance Spectrum ◽  
Chemical Shifts ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
H Nmr ◽  
First Time ◽  
Magnetic Resonance Spectra

The 13C magnetic resonance spectrum of cancentrine is reported. Assignments of chemical shifts have been made by comparison of the cancentrine spectrum with the published spectra of codeine, codeinone, and cularine and with the spectra reported here for the first time of 9,10-dihydrocancentrine methine-O-methyl ether and 10-oxocodeinone. The spectral data so obtained have been used to interpret the 13C spectrum of 10-oxocancentrine, a new alkaloid of the cancentrine family, and to verify the structure deduced for it from 1H nmr, ir, uv, and mass spectral data.

THE ANALYSIS OF NUCLEAR MAGNETIC RESONANCE SPECTRA: IV. FOUR NUCLEI: AB3

1958 ◽  
Vol 36 (9) ◽  
pp. 1302-1307 ◽  
Author(s):  
R. J. Abraham ◽  
J. A. Pople ◽  
H. J. Bernstein
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Resonance Spectrum ◽  
Proton Magnetic Resonance Spectrum ◽  
Methyl Mercaptan ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The proton magnetic resonance spectrum of methyl mercaptan has been analyzed on the basis of the nuclear grouping AB3. The spectrum calculated for [Formula: see text] agrees very well with that observed.

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