dc.creator Piotrowski, E. A. en_US dc.creator Sundaram, S. en_US dc.creator Miller, Sidney I. en_US dc.creator Cleveland, Forrest F. en_US dc.date.accessioned 2006-06-15T12:53:04Z dc.date.available 2006-06-15T12:53:04Z dc.date.issued 1958 en_US dc.identifier 1958-I-05 en_US dc.identifier.uri http://hdl.handle.net/1811/7754 dc.description $^{*}$Supported partly by a grant from the National Science Foundation. $^{1}$R. E. Kagarise, J. Cham. Phys. 24, 300 (1956). en_US dc.description Author Institution: Illinois Institute of Technology en_US dc.description.abstract “The Raman spectrum of $C_{2}D_{2}Br_{4}$ was obtained with a Hilger 2-prism spectrograph. The Raman displacements $\Delta\sigma$, in $K$ ($K$ = kayser=wave/cm), the relative intensities l, and the depolorization factors $\rho$ are: $\Delta\sigma({I})\rho =$ 63(15)0.73, 112(13)0.55, 146(17)0.70, 175(19)0.68, 217(100)0.11, 434(7)0.77, 520(20)0.03, 603(6)0.35, 659(25)0.43, 793(2)0.82, 835(1)0.86, 873(3)0.72, 900(16)0.65, 944(0)0.66?, 073(1)0.86, 1065(12)0.21, and 2228(12)0.34. Also, infrared data were obtained in the region 400-4000 K. Of the 57 observed bands, the wave numbers $\sigma$ in $K$ of the intense ones are: $\sigma({I}) = 436$ (s), 521 (s), 569(m), 592(vs), 618(m), 655(vs), 838(vs), 901(vs), 976(vs), 1069(s), and 2232(vs). Raman and infrared spectral data also were obtained for $C_{2}H_{2}Br_{2}$. These data are essentially in agreement with Kagarise’s $results.^{1}$ A normal coordinate treatment using the Wilson FG matrix technique has been carried out for the trans isomer of each molecule by transferring potential energy constants from the molecules $CH_{2}Br_{2}$ and $C_{2}H_{2}Cl_{4}$. The tentative assignments for $C_{2}H_{2}Br_{4}$ are: $b_{g}-184, 724, 1133$; ${a}_{u}-637, 1139$; ${b}_{u}=-282, 586, 1117, 2985$; and for $C_{2}D_{2}Br_{4}$ they are: ${b}_{g}-184, 944$; ${a}_{u}-592, 873$; and ${b}_{u}-569, 838, 2232$. A complete assignment of all the observed bands for the two forms of both molecules will be reported elsewhere after the completion of the normal coordinate treatment which is now in progress for the gauche isomer.” en_US dc.format.extent 138470 bytes dc.format.mimetype image/jpeg dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title ROTATIONAL ISOMERISM OF $Br_{2}DC-CDBr_{2}$$^{*}$ en_US dc.type article en_US
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