Mass and FTIR Spectroscopic Investigations of Gaseous Manganese Tetrafluoride

Knudsen effusion mass spectrometry has been applied to establish the optimum in situ conditions for the MnF4 synthesis. MnF4 has been generated in the gas phase over the MnF3(s)−TbF4(s) system at 650−780 K in the Knudsen cell. Under the same conditions the supplying gas for the matrix isolation IR spectra was formed. The infrared spectrum of argon-isolated MnF4 molecules has been obtained for the first time. A Td symmetry is suggested for the MnF4 molecule.