Views: 12 Author: Site Editor Publish Time: 2022-08-24 Origin: Site
Melting point: 16.6 ℃
Boiling point: 117.9 ℃
Flash point: 39 ℃ (CC)
Refractive index: 1.371 (20 ℃)
Saturated vapor pressure: 1.52kpa (20 ℃)
Critical temperature: 321.6 ℃
Critical pressure: 5.78mpa
Ignition temperature: 426 ℃
Upper explosive limit (V / V): 16.0%
Lower explosive limit (V / V): 5.4%
Appearance: colorless transparent liquid
Solubility: soluble in water, ethanol, ether, glycerol, insoluble in carbon disulfide
The crystal structure of acetic acid shows that the molecules are bound by hydrogen bonds to form dimer (also known as dimer), and the dimer also exists in the vapor state at 120 ℃. The dimer has high stability. It has been proved that carboxylic acids with small molecular weight such as formic acid and acetic acid exist in the form of dimer in the solid and liquid state, or even in the gas state, through the freezing point lowering determination of molecular weight and X-ray diffraction. When acetic acid is dissolved in water, the hydrogen bond between the dimers will break quickly. Other carboxylic acids have similar dimerization.
Molar refractive index: 12.87
Molar volume (cm3 / mol): 56.1
Isotonic specific volume (90.2 K): 133.5
Surface tension (dyne / cm): 31.9
Polarizability (10-24 cm3): 5.10
Acetic acid computational chemistry data
Reference value for hydrophobic parameter calculation (xlogp): - 0.2
Number of hydrogen bond donors: 1
Number of hydrogen bond receptors: 2
Number of rotatable chemical bonds: 0
Number of tautomers: 0
Topological molecular polar surface area: 37.3
Number of heavy atoms: 4
Surface charge: 0
Number of isotope atoms: 0
Determine the number of atomic stereocenters: 0
Number of indeterminate atomic stereocenters: 0
Determine the number of chemical bond steric centers: 0
Number of indeterminate chemical bond steric centers: 0
Number of covalent bond units: 1
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