Mass spectra and vibrational spectra of ‘TeCl2Br2’. The vibrational spectrum of tellurium tetrachloride

Abstract

Mass spectrometric studies show the presence of more than one compound in the vapour above TeCl₂Br₂. In agreement with this observation, at least five ‘stretching modes’ are found from Raman and i.r. studies of ‘TeCl₂Br₂’ in the gas-phase. A previous assignment of stereochemistry on the basis of the Raman spectrum of TeCl₂Br₂ cannot be confirmed. Matrix i.r. and Raman spectra, and gas-phase i.r. spectra (using an i.r. cell with sealed-in silicon windows), are reported for tellurium tetrachloride. The results do not disagree with a C_2ν, formulation for this molecule.