Microwave Spectrum of Methylamine

Abstract

Microwave spectra of CH 3 NH 2 and CH 3 ND 2 were observed mainly in the 20 to 60 GHz region, and were analyzed by the internal axis method. The spectrum of CD 3 ND 2 observed by Lide was reanalyzed. Rotational terms, internal rotation terms and inversion terms were determined and the inertia constants including I α were given for each molecule. The barriers to internal rotation are 684.1 cm -1 , 678.7 cm -1 for CH 3 NH 2 , CH 3 ND 2 and CD 3 ND 2 respectively. Dipole moment and quadrupole coupling constants of CH 3 ND 2 were determined.