Studies of carbon--isotope fractionation. Annual progress report, December 1, 1974--November 30, 1975 [electronic resource]
The vapor pressure isotope effect of ¹³C/¹²C-substitution in CClF₃ was measured at temperatures between 169° and 206°K by means of cryogenic distillation. The ¹³C/¹²C-vapor pressure isotope effect in CHF₃ was also studied at temperatures between 161° and 205°K by a similar method. The construction o...
Saved in:
| Online Access: |
Online Access |
|---|---|
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Oak Ridge, Tenn. :
distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1975.
|
| Subjects: |
MARC
| LEADER | 00000nam a22000003u 4500 | ||
|---|---|---|---|
| 001 | b7635701 | ||
| 003 | CoU | ||
| 005 | 20130725000000.0 | ||
| 006 | m o d f | ||
| 007 | cr ||||||||||| | ||
| 008 | 131210e19751201||| ot f0|||||eng|d | ||
| 035 | |a (TOE)ost7353313 | ||
| 035 | |a (TOE)7353313 | ||
| 040 | |a TOE |c TOE | ||
| 049 | |a GDWR | ||
| 072 | 7 | |a 37 |2 edbsc | |
| 086 | 0 | |a E 1.99:coo-3127-14 | |
| 086 | 0 | |a E 1.99:coo-3127-14 | |
| 088 | |a coo-3127-14 | ||
| 245 | 0 | 0 | |a Studies of carbon--isotope fractionation. Annual progress report, December 1, 1974--November 30, 1975 |h [electronic resource] |
| 260 | |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, |c 1975. | ||
| 300 | |a Pages: 133 : |b digital, PDF file. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through SciTech Connect. | ||
| 500 | |a 12/01/1975. | ||
| 500 | |a "coo-3127-14" | ||
| 500 | |a Ishida, T. | ||
| 500 | |a Brooklyn Coll., N.Y. (USA) | ||
| 520 | 3 | |a The vapor pressure isotope effect of ¹³C/¹²C-substitution in CClF₃ was measured at temperatures between 169° and 206°K by means of cryogenic distillation. The ¹³C/¹²C-vapor pressure isotope effect in CHF₃ was also studied at temperatures between 161° and 205°K by a similar method. The construction of a cryostat has progressed as scheduled. The investigation of carbon isotope exchange equilibria between carbon dioxide and various carbamates dissolved in various organic solvents has continued. The five-stage system of Taylor-Ghate design was improved to shorten the transient time. A single stage apparatus was designed, built, and tested. These systems are used to measure the equilibrium constants and various phase equilibria involved in the carbon dioxide--carbamate system. The investigation of the explicit method of total isotope effect has made progress. A satisfactory approximation was found for the classical partition function of a Morse oscillator. The method gives a reasonable result at rho identical with ¹/₂..sqrt..(u/sub e//x/sub e/) greater than 1.5. The medium cluster approach was applied to isotopic methanes to investigate the effects of intermolecular distance and mutual orientations of molecules in the liquid upon vapor pressure isotope effect. It was found that all geometrical effects studied tend to vanish as the size of clusters is increased. Isotope effect in the zero-point energy shifts on condensation was calculated on the basis of London dispersion forces in liquid and a semi-empirical molecular orbital theory, and was favorably compared with experimental results. (auth) | |
| 536 | |b E(11-1)-3127. | ||
| 650 | 7 | |a Organic Fluorine Compounds. |2 local. | |
| 650 | 7 | |a Equations. |2 local. | |
| 650 | 7 | |a Even-even Nuclei. |2 local. | |
| 650 | 7 | |a Alkanes. |2 local. | |
| 650 | 7 | |a Stable Isotopes. |2 local. | |
| 650 | 7 | |a Physical Properties. |2 local. | |
| 650 | 7 | |a Isotopes. |2 local. | |
| 650 | 7 | |a Molecular Structure. |2 local. | |
| 650 | 7 | |a Carbon Isotopes. |2 local. | |
| 650 | 7 | |a Research Programs. |2 local. | |
| 650 | 7 | |a Solvents. |2 local. | |
| 650 | 7 | |a Spectroscopy. |2 local. | |
| 650 | 7 | |a Organic Nitrogen Compounds. |2 local. | |
| 650 | 7 | |a Carboxylic Acid Salts. |2 local. | |
| 650 | 7 | |a Deuterium Compounds. |2 local. | |
| 650 | 7 | |a Thermostats. |2 local. | |
| 650 | 7 | |a Distillation. |2 local. | |
| 650 | 7 | |a Organic Chlorine Compounds. |2 local. | |
| 650 | 7 | |a Phase Transformations. |2 local. | |
| 650 | 7 | |a Hydrogen Compounds. |2 local. | |
| 650 | 7 | |a Isotopic Exchange. |2 local. | |
| 650 | 7 | |a Labelled Compounds. |2 local. | |
| 650 | 7 | |a Design. |2 local. | |
| 650 | 7 | |a Vapor Pressure. |2 local. | |
| 650 | 7 | |a Organic Solvents. |2 local. | |
| 650 | 7 | |a Organic Compounds. |2 local. | |
| 650 | 7 | |a Research Programs Distillation. |2 local. | |
| 650 | 7 | |a Amines. |2 local. | |
| 650 | 7 | |a Mathematical Models. |2 local. | |
| 650 | 7 | |a Separation Processes. |2 local. | |
| 650 | 7 | |a Energy Levels. |2 local. | |
| 650 | 7 | |a Equipment. |2 local. | |
| 650 | 7 | |a Organic Halogen Compounds. |2 local. | |
| 650 | 7 | |a Even-odd Nuclei. |2 local. | |
| 650 | 7 | |a Oxygen Compounds. |2 local. | |
| 650 | 7 | |a Carbon Compounds. |2 local. | |
| 650 | 7 | |a Carbon Dioxide. |2 local. | |
| 650 | 7 | |a Fluids. |2 local. | |
| 650 | 7 | |a Cryostats. |2 local. | |
| 650 | 7 | |a Thermodynamic Properties. |2 local. | |
| 650 | 7 | |a Low Temperature. |2 local. | |
| 650 | 7 | |a Thermodynamics. |2 local. | |
| 650 | 7 | |a Isotope Effects. |2 local. | |
| 650 | 7 | |a Mass Spectroscopy. |2 local. | |
| 650 | 7 | |a Vapor Condensation. |2 local. | |
| 650 | 7 | |a Control Equipment. |2 local. | |
| 650 | 7 | |a Carbon 13. |2 local. | |
| 650 | 7 | |a Carbamates. |2 local. | |
| 650 | 7 | |a Carbon 12. |2 local. | |
| 650 | 7 | |a Liquids. |2 local. | |
| 650 | 7 | |a Carbon Oxides. |2 local. | |
| 650 | 7 | |a Oxides. |2 local. | |
| 650 | 7 | |a Light Nuclei. |2 local. | |
| 650 | 7 | |a Hydrocarbons. |2 local. | |
| 650 | 7 | |a Nuclei. |2 local. | |
| 650 | 7 | |a Carbonic Acid Derivatives. |2 local. | |
| 650 | 7 | |a Chalcogenides. |2 local. | |
| 650 | 7 | |a Inorganic, Organic, Physical And Analytical Chemistry. |2 edbsc. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
| 856 | 4 | 0 | |u http://www.osti.gov/servlets/purl/7353313/ |z Online Access |
| 907 | |a .b76357016 |b 03-07-23 |c 12-11-13 | ||
| 998 | |a web |b 12-11-13 |c f |d m |e p |f eng |g |h 0 |i 2 | ||
| 956 | |a Information bridge | ||
| 999 | f | f | |i 41da8297-8947-5ca8-91bc-c2ccb7288e1f |s 7ebe7fd7-0c1b-5171-9578-df988b7f58dc |
| 952 | f | f | |p Can circulate |a University of Colorado Boulder |b Online |c Online |d Online |e E 1.99:coo-3127-14 |h Superintendent of Documents classification |i web |n 1 |