Raman and infrared spectra of dimethyl ether 13C-isotopologue (CH3O13CH3) from a CCSD(T) potential energy surface

► Study of low-lying vibrational bands of 13C-dimethyl ether. ► A 3D Hamiltonian involving two CH3 internal rotors and the COC-bending is solved. ► A CCSD(T) potential energy surface already reported for the main species was used. ► Transition frequencies in the infrared and Raman spectra have been predicted. ► A symmetrization procedure different to a textbook approach is carried out.