Abstract
AbstractThe RAMAN spectrum of RbClF4 is reported. The square‐planar structure (D4h symmetry) of ClF in RbClF4 is confirmed. Force constants are calculated for ClF4, indicating that the bonding in ClF4 is best described by the semi−empirical molecular orbital model involving mainly two delocalized p electron−pairs of the chlorine atom for the formation of two semi−ionic 3 center−4 electron p–σ bonds. A very unusual occurrence of two bending modes at a frequency higher than that of one of the stretching modes has been observed in the vibrational spectra of ClF and a possible explanation is given. The approximately square‐planar part of the ClF5 molecule is compared with ClF. The assignment of the vibrational spectra and force constants reported by BEGUN et al. for ClF5 are confirmed.
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