Infrared emission spectroscopy of the [10.5][sup 5]Δ–X[sup 5]Δ system of VF

Ram, R. S.; Bernath, P. F.; Davis, S. P.
April 2002
Journal of Chemical Physics;4/22/2002, Vol. 116 Issue 16, p7035
Academic Journal
The emission spectrum of VF has been investigated in the 3400–17 000 cm-1 region using a Fourier transform spectrometer. The bands were excited in a high temperature carbon tube furnace from the reaction of vanadium metal vapor with CF[sub 4], as well as in a microwave discharge through a flowing mixture of VF[sub 4] vapor and helium. Several bands observed in the 9000–12 000 cm-1 region have been attributed to VF. The bands with high wave number R heads near 9156.8, 9816.4, 10 481.4, 11 035.8, and 11 587.2 cm-1 have been assigned as the 0-2, 0-1, 0-0, 1-0, and 2-0 bands, respectively, of the new [10.5][sup 5]Δ–X[sup 5]Δ system of VF. A rotational analysis of the [sup 5]Δ[sub 1]–[sup 5]Δ[sub 1], [sup 5]Δ[sub 2]–[sup 5]Δ[sub 2], [sup 5]Δ[sub 3]–[sup 5]Δ[sub 3], and [sup 5]Δ[sub 4]–[sup 5]Δ[sub 4] subbands of the 0-1, 0-0, 1-0, and 2-0 bands has been carried out and spectroscopic parameters for VF have been obtained for the first time. The following equilibrium constants have been determined for the ground state of VF by averaging the constants of the different spin components: ΔG(1/2)=665.10 cm[sup -1], B[sub e]=0.3863 cm[sup -1], α[sub e]=0.0028 cm[sup -1], and r[sub e]=1.7758 Å. © 2002 American Institute of Physics.


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