Trends in the alkaline-earth amide series: The millimetre-wave spectrum of MgNH2 and MgND2 (X2A1)

The far-infrared laser magnetic resonance spectrum (FIR LMR) of the v5 bending vibrational transition of DCCN in its X3 S- state is reported. The DCCN radical was produced inside the spectrometer cavity by the reaction of deuterated acetonitrile with F atoms. DCCN resonances were measured on seven laser lines. Nitrogen hyperfine structure was observed on a number of the resonances. The analysis provides improved accuracy for the separation v5= 1 -0 and some of the 14N hyperfine coupling constants for this isotopomer.