Abstract
The infrared spectra of SbF5 and AsF5 suspended in argon and neon matrices have been recorded between 4000 and 100 cm−1. The spectra of SbF5 and AsF5 are radically different and show that monomeric SbF5 belongs to symmetry group C4υ rather than to group D3h. The spectral effects induced by forming solid SbF5 from the monomers are understood in terms of associations through Sb–F–Sb fluorine bridge bonds. The behavior is compared with that observed previously for SF4. No evidence for fluorine bridging occurs with AsF5.
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