The nuclear magnetic resonance spectra of aromatic fluorocarbons. The peri F–F coupling constants in fluoronaphthalenes and related compounds

1969 ◽  
Vol 0 (18) ◽  
pp. 1049a-1049a ◽  
Author(s):  
R. A. Fletton ◽  
R. D. Lapper ◽  
L. F. Thomas
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Coupling Constants ◽  
Nuclear Magnetic Resonance Spectra ◽  
Related Compounds ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

High-resolution nuclear-magnetic-resonance spectra of hydrocarbon groupings - V. ABCX spectra of vinyl fluoride and 3-methylbut-l-ene

1961 ◽  
Vol 263 (1312) ◽  
pp. 136-148 ◽  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Coupling Constants ◽  
Vinyl Fluoride ◽  
General Properties ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Some general properties of ABCX -type spectra are discussed. It is shown that it is possible to deduce from such spectra the relative signs of all inter-nuclear coupling constants. Analyses are presented of the hydrogen (proton) spectra from the vinyl groups of vinyl fluoride and 3-methylbut-l-ene, and of the fluorine spectrum of the former molecule. It is shown that all HF coupling constants in vinyl fluoride are of the same sign as the cis and trans HH coupling constants.

LYCOPODIUM ALKALOIDS: IV. THE CONSTITUTION AND STEREOCHEMISTRY OF LYCOCLAVINE, AN ALKALOID OF LYCOPODIUM CLAVATUM VAR. MEGASTACHYON

1962 ◽  
Vol 40 (11) ◽  
pp. 2088-2100 ◽  
Author(s):  
W. A. Ayer ◽  
D. A. Law
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Lycopodium Clavatum ◽  
Nuclear Magnetic Resonance Spectra ◽  
Lycopodium Alkaloids ◽  
Related Compounds ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The alkaloids of Lycopodium clavatum var. megastachyon have been examined and two hitherto unreported alkaloids, lycoclavine and acetyllycoclavine, were isolated and their structures determined. The nuclear magnetic resonance spectra of these and related compounds are discussed in terms of the conformation of ring B in these alkaloids.

Dibenzo[a,d]cycloheptene and related compounds. II. The synthesis of some 11-substituted dibenzo[b,e]azepin-6-one, 5-substituted dibenzo[a,d]cycloheptene, and 12-substituted dibenzo[a,d]cyclooctene derivatives

1969 ◽  
Vol 47 (23) ◽  
pp. 4327-4333 ◽  
Author(s):  
K. Ackermann ◽  
J. Chapuis ◽  
D. E. Horning ◽  
G. Lacasse ◽  
J. M. Muchowski
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Improved Method ◽  
Modified Technique ◽  
Nuclear Magnetic Resonance Spectra ◽  
Related Compounds ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The synthesis of several 11-substituted-5,6-dihydro-11H-dibenzo[b,e]azepin-6-ones, and an improved method of preparing 5-cyano-10,11-dihydro-5H-dibenzo[a,d]cycloheptene and 12-cyano-5,6,7,12-tetrahydrodibenzo[a,d]cyclooctene are described.A description of the synthesis of epoxides from diaryl ketones and dimethylsulfonium methylide by a modified technique is given.The nuclear magnetic resonance spectra of several of the 11-substituted dibenzo[b,e]azepin-6-ones are interpreted on the basis of a slow interconversion between diastereomeric boat conformers in which the C-11 substituent is quasi axial or quasi equatorial.

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