Far-infrared Spectroscopy of Dimethyl-Ether and its 13 C-enriched Isotopologues and First Spectrosco

In this study two different molecules, dimethylether and its ¹³C substituted isotopologues as well as tert-butyl-dibromophosphane have been spectroscopically investigated by the means of Fourier-Transform infrared spectroscopy. The spectra of dimethyl-ether isotopologues were recorded at the AILES beamline at the SOLEIL Synchrotron facility in a spectral range between 70 cm-1 and 500 cm-1. Despite of recent laboratory studies and its increasing relevance to astrophysics, accurate high resolution spectra of the vibrational excited ¿7 band of all isotopologues have been missing up to now. Tert-butyl-dibromophosphane is a complex molecule and the main abundant isotopologue tBuP79 Br81Br is chiral. All associated vibrational modes could be calculated. A first broadband spectrum of tert-butyl-dibromophosphane between 80cm-1 and 3100 cm-1 could be obtained by a combination of experiments at the Kassel university laboratories and at SOLEIL in France. von Kutzer, Pia