Chemical Properties of Dimethylketene (CAS 598-26-5)


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InChI Key
Molecular Weight1
Other Names
  • (CH3)2C=C=O
  • 1,1-Dimethylketene
  • 1-Propen-1-one, 2-methyl-
  • 2-methyl-1-propen-1-one
  • Ketene, dimethyl-
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Physical Properties

Property Value Unit Source
Δf -55.81 kJ/mol Joback Calculated Property
Δfgas -106.09 kJ/mol Joback Calculated Property
Δfus 12.34 kJ/mol Joback Calculated Property
Δvap 30.75 kJ/mol Joback Calculated Property
IE [8.38; 8.45] eV Show Hide
IE 8.38 eV NIST
IE 8.45 eV NIST
IE 8.38 eV NIST
log10WS -5.29 Crippen Calculated Property
logPoct/wat 0.784 Crippen Calculated Property
McVol 64.490 ml/mol McGowan Calculated Property
Pc 5359.18 kPa Joback Calculated Property
Inp [484.00; 484.00]   Show Hide
Inp 484.00 NIST
Inp 484.00 NIST
I [1215.00; 1215.00]   Show Hide
I 1215.00 NIST
I 1215.00 NIST
Tboil 284.95 K Joback Calculated Property
Tc 448.33 K Joback Calculated Property
Tfus 143.30 K Joback Calculated Property
Vc 0.258 m3/kmol Joback Calculated Property

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,gas [90.99; 123.59] J/mol×K [284.95; 448.33] Show Hide
Cp,gas 90.99 J/mol×K 284.95 Joback Calculated Property
Cp,gas 97.10 J/mol×K 312.18 Joback Calculated Property
Cp,gas 102.92 J/mol×K 339.41 Joback Calculated Property
Cp,gas 108.47 J/mol×K 366.64 Joback Calculated Property
Cp,gas 113.76 J/mol×K 393.87 Joback Calculated Property
Cp,gas 118.80 J/mol×K 421.10 Joback Calculated Property
Cp,gas 123.59 J/mol×K 448.33 Joback Calculated Property


Property Value Unit Temperature (K) Source
Pvap [1.33; 397.76] kPa [267.44; 389.81] The Yaw... Show Hide
Equationln(Pvp) = A + B/(T + C)
Coefficient A1.64479e+01
Coefficient B-3.63072e+03
Coefficient C-4.27740e+01
Temperature range, min.267.44
Temperature range, max.389.81
Pvap 1.33 kPa 267.44 Calculated Property
Pvap 3.35 kPa 281.04 Calculated Property
Pvap 7.63 kPa 294.63 Calculated Property
Pvap 15.97 kPa 308.23 Calculated Property
Pvap 31.10 kPa 321.83 Calculated Property
Pvap 56.91 kPa 335.42 Calculated Property
Pvap 98.73 kPa 349.02 Calculated Property
Pvap 163.42 kPa 362.62 Calculated Property
Pvap 259.62 kPa 376.21 Calculated Property
Pvap 397.76 kPa 389.81 Calculated Property

Similar Compounds

1-Propene, 2-methyl-. 2-Methylallyl radical. 1,2-Butadienone, 3-methyl-. 2-Butene, 2,3-dimethyl-. 1-Propene, 1,1-dichloro-2-methyl-. 1,2-Butadiene, 3-methyl-. 2,3-Pentadiene, 2,4-dimethyl-. 1-Propene, 1-chloro-2-methyl-. 2,3,4-Hexatriene, 2,5-dimethyl-. 1-Bromo-2-methylpropene. C(CH3)2. Methacrolein. 3-methyl-2-butenenitrile. 2-Butene, 2-methyl-. Prop-1-en-1,2-dimethyl-1-ol.

Find more compounds similar to Dimethylketene.


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