Far-infrared Spectroscopy of Dimethyl-Ether and its 13 C-enriched Isotopologues and First Spectroscopic Characterization of Tert-butyl-dibromophosphane

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.