Stable isotope studies. Annual progress report, March 1, 1980-February 28, 1981
Vapor pressures of /sup 12/CHF/sub 3/, /sup 13/CHF/sub 3/, and /sup 12/CDF/sub 3/ were measured between -147 and -60/sup 0/C. The normal isotope effect of deuterium with a positive slope and the inverse isotope effect of /sup 13/C with a negative slope in the plot of T 1n(P'/P) vs 1/T are simultaneously explanable only in terms of a blue-shift in the C-H stretching frequency upon condensation of fluoroform molecules. Vapor pressures of /sup 12/CH/sub 3/F, /sup 13/CH/sub 3/F, and /sup 12/CD/sub 3/F were also measured between -141 and -60/sup 0/C. The deuterium effect is a normal isotope effect with a large positive slope. The /sup 13/C effect is an inverse isotope effect with a slightly positive slope. A nitrogen-15 exchange column based on the pressurized NO/N/sub 2/O/sub 3/ system was constructed. New refluxer designs were developed. Two FORTRAN programs have been written for studies of differential isotope effect.
- Research Organization:
- State Univ. of New York, Stony Brook (USA). Dept. of Chemistry
- DOE Contract Number:
- AC02-80ER10612
- OSTI ID:
- 6715826
- Report Number(s):
- DOE/ER/10612-1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
CARBON 12
CARBON 13
CARBON ISOTOPES
COMPUTER CODES
DEUTERIUM
DISTILLATION EQUIPMENT
EQUIPMENT
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUORINATED ALIPHATIC HYDROCARBONS
FLUOROFORM
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPE SEPARATION
ISOTOPES
LIGHT NUCLEI
LOW TEMPERATURE
METHYL FLUORIDE
NITROGEN ISOTOPES
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
RESEARCH PROGRAMS
SEPARATION PROCESSES
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
CARBON 12
CARBON 13
CARBON ISOTOPES
COMPUTER CODES
DEUTERIUM
DISTILLATION EQUIPMENT
EQUIPMENT
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUORINATED ALIPHATIC HYDROCARBONS
FLUOROFORM
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPE SEPARATION
ISOTOPES
LIGHT NUCLEI
LOW TEMPERATURE
METHYL FLUORIDE
NITROGEN ISOTOPES
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
RESEARCH PROGRAMS
SEPARATION PROCESSES
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE