Collect. Czech. Chem. Commun. 1983, 48, 984-988

Determination of coupling constants of nitrogen in amino group of nitroanilines by means of relaxation times in rotating frame

Vladimír Mlynárik

Czechoslovak Institute of Metrology, 825 62 Bratislava


One-bond coupling constants of amino nitrogen in 2-, 3- and 4-nitroanilines have been calculated on the basis of 1H and 13C relaxation times in rotating frame (T) which are affected by interaction with rapidly relaxing 14N nucleus. A method has been suggested and tested for calculation of 14N-13C couplings with elimination of effects of other relaxation mechanisms. Dependence of 1J(14N13C) on position of nitro group in the aromatic nucleus has been observed.