Chemical Properties of 1H-Imidazole (CAS 288-32-4)

1H-Imidazole

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InChI
InChI=1S/C3H4N2/c1-2-5-3-4-1/h1-3H,(H,4,5)
InChI Key
RAXXELZNTBOGNW-UHFFFAOYSA-N
Formula
C3H4N2
SMILES
c1c[nH]cn1
Molecular Weight1
68.08
CAS
288-32-4
Other Names
  • 1,3-Diaza-2,4-cyclopentadiene
  • 1,3-Diazole
  • Formamidine, N,N'-vinylene-
  • Glyoxalin
  • Glyoxaline
  • IMD
  • Imidazol
  • Imidazole
  • Iminazole
  • Imutex
  • Methanimidamide, N,N'-1,2-ethenediyl-
  • Miazole
  • NSC 60522
  • Pyrro(b)monazole
  • USAF EK-4733
Sources

Physical Properties

Property Value Unit Source
PAff 942.80 kJ/mol NIST
BasG 909.20 kJ/mol NIST
Δcsolid -1801.90 ± 0.50 kJ/mol NIST
Δcsolid -1810.60 ± 3.30 kJ/mol NIST
Δcsolid -1802.00 kJ/mol NIST
Δfgas [128.00; 139.30] kJ/mol Show Hide
Δfgas 129.50 kJ/mol NIST
Δfgas 139.30 ± 1.90 kJ/mol NIST
Δfgas 132.90 ± 0.60 kJ/mol NIST
Δfgas 128.00 ± 7.50 kJ/mol NIST
Δfsolid 49.80 ± 0.60 kJ/mol NIST
Δfsolid 58.50 ± 3.30 kJ/mol NIST
Δsub [66.90; 85.40] kJ/mol Show Hide
Δsub 83.10 ± 0.20 kJ/mol NIST
Δsub 83.10 kJ/mol NIST
Δsub 83.10 ± 0.20 kJ/mol NIST
Δsub 74.50 ± 0.40 kJ/mol NIST
Δsub 66.90 ± 4.20 kJ/mol NIST
Δsub 69.50 kJ/mol NIST
Δsub 85.30 kJ/mol NIST
Δsub 85.40 kJ/mol NIST
IE [8.78; 9.12] eV Show Hide
IE 8.81 ± 0.01 eV NIST
IE 8.81 ± 0.01 eV NIST
IE 9.12 eV NIST
IE 8.96 eV NIST
IE 8.78 eV NIST
logPoct/wat 0.41 Crippen Calculated Property
Tboil 530.20 K NIST
Tfus 363.70 ± 0.40 K NIST
Tfus 361.90 ± 0.20 K NIST
Ttriple 362.69 ± 0.02 K NIST

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,solid 82.40 J/mol×K 298.15 NIST
Cp,solid 89.78 J/mol×K 300.0 NIST
Cp,solid 94.40 J/mol×K 310.0 NIST
ΔfusH [12.50; 12.82] kJ/mol [361.90; 363.70] Show Hide
Plot of Enthalpy of fusion at a given temperature.
ΔfusH 12.80 kJ/mol 361.9 NIST
ΔfusH 12.80 kJ/mol 361.9 NIST
ΔfusH 12.80 kJ/mol 361.9 NIST
ΔfusH 12.82 kJ/mol 362.69 NIST
ΔfusH 12.50 kJ/mol 363.7 NIST
ΔsubH 80.80 kJ/mol 299.0 NIST
ΔsubH 83.10 ± 0.20 kJ/mol 300.5 NIST
ΔfusS 35.37 J/mol×K 361.9 NIST
ΔfusS 35.35 J/mol×K 362.69 NIST

Similar Compounds

1H-Imidazole, 2-methyl-. Imidazole, 2-methyl-, hydrochloride. 2H-Imidazole-2-thione, 1,3-dihydro-. 1,3-Diazine. 1H-Imidazole, 1-methyl-. Pyrazine. 4-Methylimidazole. 4-Cl-pyrazole. 1H-Imidazole, 2-ethyl-. 1H-imidazole-2-carboxaldehyde. 1,2,4-Triazine. 1,3,5-Triazine. Pyrimidine, 5-methyl-. 2-Isopropylimidazole. Pyrimidine, 2-methyl-.

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Outlier This icon means that the value is more than 2 standard deviations away from the property mean.