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A5: Dipole Moments

The following table(1) lists the dipole moments of more common chemical substances. Along with the dipole moment the length of the dipole is shown.

Substance State(2) Dipole Moment
*1030 \(C\cdot m\)
Dipole Length
[pm]
acetaldehyde b 8.3 52
acetamide b 12.3 77
acetic acid b 3.3 to 5.0 21 to 31
acetone l 10.0 62
acetonitrile b 11.7 73
acetophenone b 9.7 60
acetylacetone b 9.3 58
acetyl chloride b 8.0 50
acrolein b 9.7 60
acrylonitrile b 11.7 73
ammonia l 3.0 19
aniline b 5.2 32
anisole l 4.0 25
benzamide b 12.2 76
benzene l 0 0
benzonitrile l 10.7 67
benzophenone b 9.0 56
bromobenzene l 5.0 31
bromoethane b 6.0 37
bromoform b 3.3 21
carbon dioxide g 0 0
carbon disulfide l 0 0
carbonyl sulfide g 2.4 15
chloroacetic acid b 7.7 48
chlorobenzene l 5.2 32
chloroethane b 6.7 42
cyclohexanol b 6.0 37
1,2-dibromoethane b 4.0 25
dichloromethane b 6.0 37
diethylamine l 3.7 23
dimethylaniline b 5.2 32
dimethylformamide l 12.7 79
dimethylsulfoxide b 13.0 81
dioxan b 1.3 8
ethanol b 5.7 35
ethyl acetate b 6.2 39
ethylamine b 4.3 27
ethylbenzene l 1.2 7
ethylene carbonate b 16.0 100
ethylene glycol b 6.7 42
ethylene oxide l 6.3 40
ethyl ether b 4.2 26
formamide b 11.3 71
formic acid b 5.0 31
furan b 2.2 14
hexane l 0 0
hydrazine l 10.0 62
hydrogen cyanide g 9.8 61
hydrogen sulfide g 3.2 20
iodoethane b 5.8 36
methanol b 5.5 34
methyl benzoate b 6.2 39
methyl ether b 4.2 26
morpholine b 5.0 31
nitric oxide g 0.5 3
nitrobenzene b 13.3 83
nitrogen dioxide g 1.3 8
nitromethane b 10.3 65
oxygen g 0 0
ozone g 2.2 14
phenol b 5.3 33
propylene oxide b 6.5 41
pyridine l 7.7 48
pyrrole b 6.0 37
quinoline l 7.0 44
styrene l 0.3 2
sulfur hexafluoride g 0 0
tetrachloromethane l 0 0
tetrahydrofuran b 5.7 35
thiophen l 1.6 10
toluene l 1.3 8
trichloromethane b 3.7 23
triethylamine l 2.8 18
s-trioxane b 7.3 46
water l 6.7 to 10.0 42 to 62
water g 6.2 39

 

  1. Data source: Tables of Physical & Chemical Constants (16th edition 1995). 2.1.4 Hygrometry. Kaye & Laby Online. Version 1.0 (2005) www.kayelaby.npl.co.uk
  2. l = liquid substance, b = substance solved in benzene, g = gaseous substance.

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