Infrared Spectra and Geometry of TiF2 and TiF3 in Rare-Gas Matrices

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Abstract
From an infrared study of gaseous TiF2 and TiF3 species isolated in neon and argon rare‐gas matrices values of the symmetric and antisymmetric vibrational frequencies were obtained. Bond‐angle measurements for TiF2, made using the isotope shift method, indicated a value of 130° ± 5°. This result has been rationalized in terms of possible electronic configurations for TiF2. Equilibrium constants for the reaction 2TiF3(g)+Ti(s)→3TiF2(g) were measured and combined with calculated free‐energy‐function data to indicate the stability of TiF2.