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Properties of substance:

pent-4-enoic acid

Synonyms:

4-pentenoic acid
allylacetic acid

Group of substances:

organic

Physical appearance:

colorless liquid

Empirical formula (Hill's system for organic substances):

C5H8O2

Structural formula as text:

CH2=CHCH2CH2COOH

Molar/atomic mass: 100.116

Melting point (°C):

-22.5

Boiling point (°C):

189

CAS №: 591-80-0

Solubility (g/100 g of solvent):

acetic acid: 7.9 (18°C) [Ref.]
acetone: 3.3 (18°C) [Ref.]
ethanol: 5.7 (18°C) [Ref.]
i-propanol: 0.27 (18°C) [Ref.]
methanol: 5.7 (18°C) [Ref.]
methyl acetate: 2.9 (18°C) [Ref.]
propanol: 1.6 (18°C) [Ref.]
pyridine: 133 (18°C) [Ref.]
water: 1.8 (18°C) [Ref.]

Density:

0.9877 (20°C, d4)

Refractive index (nD):

1.428 (20°C)

Vapour pressure (Torr):

12 (84°C)
15 (90°C)

Dissociation:

pKa (1) = 4.68 (25°C, water)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-430.6 (l)

References:

  1. Armarego W. L. F. Purification of Laboratory Chemicals. - 7ed. - 2013. - pp. 113
  2. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-28
  3. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 874-875 [Russian]
  4. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 86 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru