Triple ^13^C-substituted ethyl cyanide

We aim to present an experimental study of the rotational spectrum of triple ^13^C-substituted ethyl cyanide, ^13^CH_3_ ^13^CH_2_ ^13^CN, in the frequency range 150-990GHz. We want to use the determined spectroscopic parameters for searching for ^13^CH_3_ ^13^CH_2_ ^13^CN in ALMA data.

The main objective of this work is to provide accurate frequency predictions to search for this molecule in the Galactic center source Sagittarius B2(N) and to facilitate its detection in space. The laboratory rotational spectrum of ^13^CH_3_ ^13^CH_2_ ^13^CN has been recorded with the Lille's fast DDS solid-state spectrometer between 150GHz and 990GHz. Results.