Show simple item record

dc.creatorPiotrowski, E. A.en_US
dc.creatorSundaram, S.en_US
dc.creatorMiller, Sidney I.en_US
dc.creatorCleveland, Forrest F.en_US
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.descriptionAuthor Institution: Illinois Institute of Technologyen_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.extent138470 bytes
dc.publisherOhio State Universityen_US
dc.titleROTATIONAL ISOMERISM OF $Br_{2}DC-CDBr_{2}$$^{*}$en_US

Files in this item


Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.

This item appears in the following Collection(s)

Show simple item record