Abstract: A Fourier transform spectrum of phosgene (Cl2CO) has been recorded in the 11.8μm spectral region at low temperature and at a resolution of 0.00102cm⁻¹ using a Bruker IFS125HR spectrometer coupled to synchrotron radiation leading to the observation of the ν 5 vibrational band of the isotopologue ³⁷Cl2CO...