Far-infrared LMR spectroscopic investigation of the quasi-linear molecule DCCN: The v5(1 -0) transition

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.