Nuclear quadrupole resonance of nitrogen-14 in some acetonitrile derivatives

Abstract

The pure quadrupole resonance of cyano nitrogen in cyanoacetic acid, methyl cyanoacetate, ethyl cyanoacetate, ethylene cyanohydrin, acetone cyanohydrin, iminodiacetonitrile, methylaminoacetonitrile, and cyanoacetamide was observed at liquid nitrogen temperature. The resonance frequencies of imino nitrogen and amide nitrogen were also detected for iminodiacetonitrile and cyanoacetamide, respectively. The observed coupling constants of cyano nitrogen were interpreted in terms of the inductive effect of various substituents. The ionic character of NH and NC bonds was estimated from the observed resonance frequencies of imino nitrogen in iminodiacetonitrile.