MICROWAVE SPECTRUM OF SULFUR OXIDE TETRAFLUORIDE

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1974

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Ohio State University

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The electron diffraction studies of $SOF_{4}$ were initially interpreted to show that the molecule was in a trigonal bipyramid structure with a near trigonal structure in the equatorial plane and the axial F-S-F configuration bent slightly toward the equatorial $oxygen.^{1}$ Following the publication of Gillespie’s bonding concepts and the effect of electron pair repulsion, the authors revised their interpretation to show that the equatorial FSF angle was decreased and the axial F-S-F configuration was bent away from the equatorial $oxygen.^{2}$ The microwave spectrum of $SOF_{4}$ has been investigated in the 12.5 to 18 GHz region and 79 lines belonging to 6 series of Q-branch transitions have been measured and assigned. The Q-branch transitions have been fit using an analytical method analogous to the conventional A-C vs $\kappa$ type plotting routine. From the assignment the two parameters, $A-C = 974.2$ MHz and $2B-A-C = - 809.0$ MHz were determined. These parameters are not in absolute agreement with either of the electron diffraction results but do indicate that the later interpretation is substantially correct.

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Partial support of this research by the National Science Foundation is acknowledged. $^{1}$ K. Kimura and S. H. Bauer, J. Chem. Phys. 39, 3172 (1963). $^{2}$ J. L. Hencher, D.W.J. Cruickshank, and S. H. Bauer, J. Chem. Phys. 48, 518 (1958).
Author Institution: Department of Chemistry, Virginia Polytechnic Institute and State University

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