It is true the acetone is much less polar 보다 ethanol. I assumed the dipole moment is proportional to polarity, and also if so, the dipole minute of acetone should be reduced than ethanol. However the dipole moment of acetone is higher than ethanol.Why is that higher?


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Dipole moment is just one of facets of solvent polarity, together is famed in HPLC separation analytical method where the following impacts take part:

Dipole moment interaction, permanent and inducedThe above for the totality molecule and also for details bondsElectron pair donorElectron pair agree (including $\ceH+$ donation)

Depending ~ above solute molecule specifics, the solvent polarity order is variable, as miscellaneous molecules have various responses to above interactions.

You are watching: Is acetone more polar than ethanol

See also Using solvent triangle in HPLC


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edited Jul 28 "19 at 3:21
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Mathew Mahindaratne
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answer Jul 27 "19 in ~ 12:33
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PoutnikPoutnik
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The bond dipole μ is given by:

$ \mu =\delta \,d$.

The bond dipole is modeled together +δ — δ- with a distance d between the partial charges +δ and δ-. It is a vector, parallel come the shortcut axis, pointing from minus come plus, as is standard for electric dipole moment vectors.

In her case, acetone has a greater dipole moment than ethanol because it has a carbonyl group an ext towards the center and also thus acetone has lesser boiling suggest than ethanol.

The an interpretation is native Wikipedia, : https://en.m.wikipedia.org/wiki/Bond_dipole_moment

EDIT : Alcohol hydrogen bonding is the significant effect here, as in the instance of water. (by
Poutnik
)

Thanks because that the edit,
MathewMahindaratne

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edited Jul 28 "19 at 4:25
answered Jul 27 "19 at 13:04
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Shishir MaharanaShishir Maharana
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