The Analysis of the Proton Magnetic Resonance Spectra of Heteroaromatic Systems. I. Indazole

1963 ◽  
Vol 16 (6) ◽  
pp. 1051 ◽  
Author(s):  
PJ Black ◽  
ML Heffernan
Keyword(s):  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Resonance Spectrum ◽  
Energy Levels ◽  
Order Theory ◽  
Proton Magnetic Resonance Spectrum ◽  
Coupling Constant ◽  
First Order ◽  
First Order Theory ◽  
Weakly Coupled

The proton magnetic resonance spectrum of indazole in acetone has been investigated at 100 Mc/s. The spectrum is of the weakly coupled five-spin type. Transitions have been assigned on the basis of first-order theory and the experimental energy levels obtained. The analysis has been carried out with the aid of a digital computer using an iterative procedure. The presence of a long-range cross-ring coupling constant of magnitude approximately 1 c/s is reported.

Proton magnetic resonance spectrum of 2,6-dichlorobenzaldoxime. Signs and magnitudes of long-range spin–spin couplings. Degree of nonplanarity

1969 ◽  
Vol 47 (19) ◽  
pp. 3707-3709
Author(s):  
T. Schaefer ◽  
R. Wasylishen
Keyword(s):  
Magnetic Resonance ◽  
Long Range ◽  
Proton Magnetic Resonance ◽  
Resonance Spectrum ◽  
Proton Magnetic Resonance Spectrum ◽  
Coupling Constant ◽  
Hydroxyl Proton ◽  
Ring Proton ◽  
Proton Shift

From the sign and magnitude of the coupling constant between the C—H proton in the sidechain and the para ring proton in 2,6-dichlorobenzaldoxime it is estimated that the deviation from coplanarity of the sidechain is at least 40°. The hydroxyl proton shift in dimethylsulfoxide solution of −11.7 p.p.m., relative to internal tetramethylsilane, indicates a cis arrangement of the hydroxyl and aromatic groups.

Proton magnetic resonance spectrum and nuclear overhauser effects of N-methylmethylenimine

1967 ◽  
Vol 22 (1-4) ◽  
pp. 112-117 ◽  
Author(s):  
Chen Fee Chang ◽  
Billy J. Fairless ◽  
M.R. Willcott ◽  
R.F. Curl ◽  
Jurgen Hinze ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Resonance Spectrum ◽  
Proton Magnetic Resonance Spectrum ◽  
Nuclear Overhauser ◽  
Nuclear Overhauser Effects
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