Nuclear Magnetic Resonance Spectroscopy. Long-Range Spin Couplings in Vinylacetylene

1962 ◽  
Vol 84 (10) ◽  
pp. 2004-2004 ◽  
Author(s):  
Eugene I. Snyder ◽  
L. J. Altman ◽  
John D. Roberts
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Long Range ◽  
Resonance Spectroscopy ◽  
Nuclear Magnetic

1,2,4-Triazines. IV. The Structural Elucidation of Some New N-Methyl 3-Amino-1,2,4-Triazin-5(2H)-ones by Carbon-13 Nuclear Magnetic Resonance Spectroscopy

1988 ◽  
Vol 41 (4) ◽  
pp. 609 ◽  
Author(s):  
NW Jacobsen ◽  
SE Rose
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Long Range ◽  
Structural Elucidation ◽  
Resonance Spectroscopy ◽  
Amino Group ◽  
Nuclear Magnetic

Methylation of 3-amino-1,2,4-triazin-5(2H)-one yields a mixture of the zwitterion 3-amino-1-methyl-1,2,4-triazinium-5-olate and 3-amino-2- methyl-1,2,4-triazin-5(2H)-one. With appropriate substituents located at position C6 and on the exocyclic amino group at C3, methylation was directed to the N1 or N2 positions exclusively. All methylation isomers were identified by carbon-13 nuclear magnetic resonance spectroscopy by reference to long-range coupling patterns.

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