2,3-dithiabutane, 3,4-dithiahexane, and 4,5-dithiaoctane: chemical thermodynamic properties from 0 to 1000/sup 0/K
Thermodynamic properties of the first three members of the symmetrical alkane disulfide series were investigated. Measurements were made of the heat of vaporization and vapor heat capacity of 2,3-dithiabutane; the low temperature thermal properties, vapor pressure and entropy of 4,5-dithiaoctane; and the heats of combustion and formation of 2,3-dithiabutane, 3,4-dithiahexane and 4,5-dithiaoctane. The new experimental data were used in revising previously published tables of thermodynamic functions for 2,3-dithiabutane and 3,4-dithiahexane. A table of thermodynamic functions for 4,5-dithiaoctane was calculated by an incremental method. Values of the heat, free energy and logarithm of the equilibrium constant of formation between 0 and 1000/sup 0/K were computed for the three compounds. The S-S thermochemical bond energy is the same in the three disulfides as in S/sub 3/ within experimental uncertainty.
- OSTI ID:
- 7219951
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 80:19; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
COMBUSTION HEAT
ENERGY
ENTHALPY
ENTROPY
FORMATION HEAT
FREE ENERGY
FUSION HEAT
HEAT
HIGH TEMPERATURE
LOW TEMPERATURE
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
ULTRALOW TEMPERATURE
VAPOR PRESSURE
VAPORIZATION HEAT
VERY LOW TEMPERATURE