Infrared and Raman Spectra of Fluorinated Ethanes. XII. 1,1,2,2-Tetrafluoroethane
The infrared absorption spectra of gaseous CHF2–CHF2 at five temperatures between 30° and 170°C and of the crystalline solid at —170°C have been obtained with a Perkin-Elmer double-pass spectrometer equipped with CsBr, NaCl, and LiF prisms. The Raman spectrum of the liquid at 20°, —25°, and —80°C ha...
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| Veröffentlicht in: | Journal of Chemical Physics (U.S.) 1960-03, Vol.32 (3), p.899-907 |
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| container_title | Journal of Chemical Physics (U.S.) |
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| creator | Klaboe, Peter Nielsen, J. Rud |
| description | The infrared absorption spectra of gaseous CHF2–CHF2 at five temperatures between 30° and 170°C and of the crystalline solid at —170°C have been obtained with a Perkin-Elmer double-pass spectrometer equipped with CsBr, NaCl, and LiF prisms. The Raman spectrum of the liquid at 20°, —25°, and —80°C has been photographed with a 3-prism glass spectrograph of reciprocal linear dispersion 15 A/mm at 4358 A, and polarization measurements have been made. In the gaseous and liquid states the compound exists as a mixture of two rotational isomers of symmetries C2h and C2, respectively, the former (trans) being the more stable. In the crystalline state only the trans configuration is present. A value of 1160±100 cal/mole was found for the enthalpy difference ΔH0 in the gas. In the liquid ΔH0 is much smaller. With some uncertainties, the vibrational fundamentals have been assigned for each isomer. |
| doi_str_mv | 10.1063/1.1730815 |
| format | Article |
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XII. 1,1,2,2-Tetrafluoroethane</title><source>AIP Digital Archive</source><creator>Klaboe, Peter ; Nielsen, J. Rud</creator><creatorcontrib>Klaboe, Peter ; Nielsen, J. Rud ; Univ. of Oklahoma, Norman</creatorcontrib><description>The infrared absorption spectra of gaseous CHF2–CHF2 at five temperatures between 30° and 170°C and of the crystalline solid at —170°C have been obtained with a Perkin-Elmer double-pass spectrometer equipped with CsBr, NaCl, and LiF prisms. The Raman spectrum of the liquid at 20°, —25°, and —80°C has been photographed with a 3-prism glass spectrograph of reciprocal linear dispersion 15 A/mm at 4358 A, and polarization measurements have been made. In the gaseous and liquid states the compound exists as a mixture of two rotational isomers of symmetries C2h and C2, respectively, the former (trans) being the more stable. In the crystalline state only the trans configuration is present. A value of 1160±100 cal/mole was found for the enthalpy difference ΔH0 in the gas. In the liquid ΔH0 is much smaller. With some uncertainties, the vibrational fundamentals have been assigned for each isomer.</description><identifier>ISSN: 0021-9606</identifier><identifier>EISSN: 1089-7690</identifier><identifier>DOI: 10.1063/1.1730815</identifier><language>eng</language><subject>CESIUM BROMIDES ; CRYSTALS ; ENTHALPY ; FLUORINATED HYDROCARBONS ; GASES ; INFRARED RADIATION ; ISOMERS ; LIQUIDS ; LITHIUM FLUORIDES ; LOW TEMPERATURE ; MEASURED VALUES ; METALS, CERAMICS, AND MATERIALS ; OPTICAL SYSTEMS ; PHOTOGRAPHY ; POLARIZATION ; RAMAN EFFECT ; SODIUM CHLORIDES ; SOLIDS ; SPECTRA ; SPECTROMETERS ; TEMPERATURE ; THERMODYNAMICS ; VIBRATIONS</subject><ispartof>Journal of Chemical Physics (U.S.), 1960-03, Vol.32 (3), p.899-907</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c169t-5b59010344e8e9c3daf00789089214e2b9e3f7f6437dc10779c59364cd5cdf983</citedby><cites>FETCH-LOGICAL-c169t-5b59010344e8e9c3daf00789089214e2b9e3f7f6437dc10779c59364cd5cdf983</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/4174854$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Klaboe, Peter</creatorcontrib><creatorcontrib>Nielsen, J. Rud</creatorcontrib><creatorcontrib>Univ. of Oklahoma, Norman</creatorcontrib><title>Infrared and Raman Spectra of Fluorinated Ethanes. XII. 1,1,2,2-Tetrafluoroethane</title><title>Journal of Chemical Physics (U.S.)</title><description>The infrared absorption spectra of gaseous CHF2–CHF2 at five temperatures between 30° and 170°C and of the crystalline solid at —170°C have been obtained with a Perkin-Elmer double-pass spectrometer equipped with CsBr, NaCl, and LiF prisms. The Raman spectrum of the liquid at 20°, —25°, and —80°C has been photographed with a 3-prism glass spectrograph of reciprocal linear dispersion 15 A/mm at 4358 A, and polarization measurements have been made. In the gaseous and liquid states the compound exists as a mixture of two rotational isomers of symmetries C2h and C2, respectively, the former (trans) being the more stable. In the crystalline state only the trans configuration is present. A value of 1160±100 cal/mole was found for the enthalpy difference ΔH0 in the gas. In the liquid ΔH0 is much smaller. With some uncertainties, the vibrational fundamentals have been assigned for each isomer.</description><subject>CESIUM BROMIDES</subject><subject>CRYSTALS</subject><subject>ENTHALPY</subject><subject>FLUORINATED HYDROCARBONS</subject><subject>GASES</subject><subject>INFRARED RADIATION</subject><subject>ISOMERS</subject><subject>LIQUIDS</subject><subject>LITHIUM FLUORIDES</subject><subject>LOW TEMPERATURE</subject><subject>MEASURED VALUES</subject><subject>METALS, CERAMICS, AND MATERIALS</subject><subject>OPTICAL SYSTEMS</subject><subject>PHOTOGRAPHY</subject><subject>POLARIZATION</subject><subject>RAMAN EFFECT</subject><subject>SODIUM CHLORIDES</subject><subject>SOLIDS</subject><subject>SPECTRA</subject><subject>SPECTROMETERS</subject><subject>TEMPERATURE</subject><subject>THERMODYNAMICS</subject><subject>VIBRATIONS</subject><issn>0021-9606</issn><issn>1089-7690</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1960</creationdate><recordtype>article</recordtype><recordid>eNot0MFLwzAYBfAgCtbpwf8geBPW-n1NmjRHGZsWBqJO8BayNGGVLR1JPfjfr3M7vcuPx-MRco9QIAj2hAVKBjVWFyRDqFUuhYJLkgGUmCsB4prcpPQDAChLnpH3JvhoomupCS39MDsT6Ofe2SEa2nu62P72sQtmGMF82JjgUkG_m6agOMVpOS3zlRupP7Le_YNbcuXNNrm7c07I12K-mr3my7eXZva8zC0KNeTVulKAwDh3tVOWtcYDyFqNm0vkrlwrx7z0gjPZWgQpla0UE9y2lW29qtmEPJx6-zR0OtlucHZj-xDG8Zqj5HXFR_R4Qjb2KUXn9T52OxP_NII-HqZRnw9jB45PWf8</recordid><startdate>19600301</startdate><enddate>19600301</enddate><creator>Klaboe, Peter</creator><creator>Nielsen, J. Rud</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19600301</creationdate><title>Infrared and Raman Spectra of Fluorinated Ethanes. XII. 1,1,2,2-Tetrafluoroethane</title><author>Klaboe, Peter ; Nielsen, J. Rud</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c169t-5b59010344e8e9c3daf00789089214e2b9e3f7f6437dc10779c59364cd5cdf983</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1960</creationdate><topic>CESIUM BROMIDES</topic><topic>CRYSTALS</topic><topic>ENTHALPY</topic><topic>FLUORINATED HYDROCARBONS</topic><topic>GASES</topic><topic>INFRARED RADIATION</topic><topic>ISOMERS</topic><topic>LIQUIDS</topic><topic>LITHIUM FLUORIDES</topic><topic>LOW TEMPERATURE</topic><topic>MEASURED VALUES</topic><topic>METALS, CERAMICS, AND MATERIALS</topic><topic>OPTICAL SYSTEMS</topic><topic>PHOTOGRAPHY</topic><topic>POLARIZATION</topic><topic>RAMAN EFFECT</topic><topic>SODIUM CHLORIDES</topic><topic>SOLIDS</topic><topic>SPECTRA</topic><topic>SPECTROMETERS</topic><topic>TEMPERATURE</topic><topic>THERMODYNAMICS</topic><topic>VIBRATIONS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Klaboe, Peter</creatorcontrib><creatorcontrib>Nielsen, J. Rud</creatorcontrib><creatorcontrib>Univ. of Oklahoma, Norman</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of Chemical Physics (U.S.)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Klaboe, Peter</au><au>Nielsen, J. Rud</au><aucorp>Univ. of Oklahoma, Norman</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Infrared and Raman Spectra of Fluorinated Ethanes. XII. 1,1,2,2-Tetrafluoroethane</atitle><jtitle>Journal of Chemical Physics (U.S.)</jtitle><date>1960-03-01</date><risdate>1960</risdate><volume>32</volume><issue>3</issue><spage>899</spage><epage>907</epage><pages>899-907</pages><issn>0021-9606</issn><eissn>1089-7690</eissn><abstract>The infrared absorption spectra of gaseous CHF2–CHF2 at five temperatures between 30° and 170°C and of the crystalline solid at —170°C have been obtained with a Perkin-Elmer double-pass spectrometer equipped with CsBr, NaCl, and LiF prisms. The Raman spectrum of the liquid at 20°, —25°, and —80°C has been photographed with a 3-prism glass spectrograph of reciprocal linear dispersion 15 A/mm at 4358 A, and polarization measurements have been made. In the gaseous and liquid states the compound exists as a mixture of two rotational isomers of symmetries C2h and C2, respectively, the former (trans) being the more stable. In the crystalline state only the trans configuration is present. A value of 1160±100 cal/mole was found for the enthalpy difference ΔH0 in the gas. In the liquid ΔH0 is much smaller. With some uncertainties, the vibrational fundamentals have been assigned for each isomer.</abstract><doi>10.1063/1.1730815</doi><tpages>9</tpages></addata></record> |
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| ispartof | Journal of Chemical Physics (U.S.), 1960-03, Vol.32 (3), p.899-907 |
| issn | 0021-9606 1089-7690 |
| language | eng |
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| source | AIP Digital Archive |
| subjects | CESIUM BROMIDES CRYSTALS ENTHALPY FLUORINATED HYDROCARBONS GASES INFRARED RADIATION ISOMERS LIQUIDS LITHIUM FLUORIDES LOW TEMPERATURE MEASURED VALUES METALS, CERAMICS, AND MATERIALS OPTICAL SYSTEMS PHOTOGRAPHY POLARIZATION RAMAN EFFECT SODIUM CHLORIDES SOLIDS SPECTRA SPECTROMETERS TEMPERATURE THERMODYNAMICS VIBRATIONS |
| title | Infrared and Raman Spectra of Fluorinated Ethanes. XII. 1,1,2,2-Tetrafluoroethane |
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