THE MICROWAVE SPECTRUM OF $BH_{3}PF_{3}$.
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Date
1965
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Ohio State University
Abstract
Transitions in the ground vibrational state for $B^{11}H_{3}PF_{3}, B^{10}H_{3}PF_{3}, B^{11}D_{3}PF_{3}, B^{10}D_{3}PF_{3}$, and $B^{11}D_{2}HPF_{3}$, have been assigned and a structure determined. The parameters are: $d(BH) = 1.207 \pm 0.003$ {\AA}, $d(PF) = 1.538 \pm 0.004$ {\AA}, $d(PB) = 1.836 \pm 0.006$ {\AA}, $\angle HBH = 115^{\circ}04' \pm 32'$ and $\angle FPF = 99^{\circ}50' \pm 26'$. For $B^{11}H_{3}PF_{3}, B^{11}D_{3}PF_{3}$, transitions have also been observed for the low frequency vibrational states. These transitions follow a normal symmetric rotor pattern for $B^{11}D_{3}PF_{3}$, and $B^{11}H_{3}PF_{3}$, however, a strong perturbation occurs between the two lowest vibrations. This gives rise to an unusual pattern. The barrier to internal rotation has been tentatively estimated to be 3 Kcal/mole.
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Author Institution: National Bureau of Standards