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The Raman Spectra and Molecular Constants of Phosphorus Trifluoride and Phosphine

Yost, Don M. and Anderson, Thomas F. (1934) The Raman Spectra and Molecular Constants of Phosphorus Trifluoride and Phosphine. Journal of Chemical Physics, 2 (10). pp. 624-627. ISSN 0021-9606. doi:10.1063/1.1749363.

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The Raman frequencies of PF3(l) were found to be omega1(1), 890 cm^-1; omega2(1), 531 cm^-1; omega3(2), 840 cm^-1; and omega4(2), 486 cm^-1, indicating a regular pyramid structure of the molecule. Three frequencies were observed for PH3(l): 2306 cm^-1, 1115 cm^-1 and 979 cm^-1. With the aid of electron diffraction data the standard virtual entropies of PF3(g), PCl3(g), AsF3(g), and AsCl3(g) at 25°C are calculated to be 64.2, 74.7, 69.2, and 78.2 cal./deg., respectively; that of PH3(g) is estimated to be 50.5 cal./deg. These data lead to the following free energies of formation at 25°C: AsCl3(g), -62,075 cal.; PH3(g), 2750 cal.; PCl3(g), -62,220 cal.

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Additional Information:Copyright © 1934 American Institute of Physics. Received July 25, 1934. We wish to express our indebtedness to Dr. L.O. Brockway and Mr. F.T. Wall for permitting us to use as yet unpublished results of electron diffraction experiments made on phosphorus trifluoride, arsenic trifluoride and arsenic trichloride. Gates Chemical Laboratory, Publication No. 423.
Issue or Number:10
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ID Code:10623
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Deposited On:22 May 2008
Last Modified:08 Nov 2021 21:09

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