Knowledge Bank

Deuterated isotopomers of organic molecules have been detected in a wide variety of interstellar sources. They are particularly abundant in star-forming regions such as the so-called Hot Core and Compact Ridge sources in the Orion Nebula. Although methyl formate is a sourse of numerous interstellar lines from star-forming regions, its singly deuterated isotopomers have not been detected in the interstellar medium due to a lack of laboratory data. Based on some previous low frequency data$\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}$, we have measured and assigned the millimeter-wave rotational spectrum of $DCOOCH3$ other three-fold symmetric internal rotors. We have also assigned some new millimeter-wave rotational lines of the asymmetric deuterated isotopomer of methanol $-CH2DOH$. Several of these lines have been utilized by radioastronomers to detect $CH2DOH$ in interstellar $space.2$