Microwave Spectrum of Methyl Thionylamine

The microwave spectrum of methyl thionylamine (CH₃NSO) has been investigated. Only the a‐type R‐branch transitions have been identified. The components of the dipole moment parallel and perpendicular to the a axis have been found to be ${\mu }_a^2{\text{=2.74±0.06,μ}}_b^2\text{=0.14±0.05}$ . The dipole moment is 1.70±0.02 D. The barrier to internal rotation of the CH₃ group in CH₃NSO has been found to be 335±15 cal/mole. No nitrogen nuclear quadrupole splittings were observed.