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Properties of substance:

malononitrile

Group of substances:

organic

Physical appearance:

colorless crystals

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

C3H2N2

Structural formula as text:

CH2(CN)2

Molar/atomic mass: 66.06

Melting point (°C):

32.1

Boiling point (°C):

220

Solubility (g/100 g of solvent):

benzene: 7.6 (20°C) [Ref.]
diethyl ether: 28.2 (20°C) [Ref.]
ethanol: 50.6 (20°C) [Ref.]
water: 13.3 (20°C) [Ref.]

Density:

1.049 (34°C, g/cm3)

Dissociation:

pKa (1) = 11.19 (25°C, water)

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

186.4 (s)

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

265.5 (g)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-23
  2. Альберт А., Сержент Е. Константы ионизации кислот и оснований. - М.-Л.: Химия, 1964. - pp. 132 [Russian]
  3. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 768-769 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru