D

Dipole

δ⁺—δ⁻ charge separation in bond or molecule; μ ≠ 0
Quick Reference
Formula / Notationδ⁺—δ⁻ charge separation in bond or molecule; μ ≠ 0
Also Known AsElectric dipole, bond dipole, molecular dipole, polar moment

What is Dipole?

A system consisting of two equal and opposite electric charges separated by a distance. In chemistry, a bond dipole arises when electrons are unequally shared between two atoms of different electronegativity. The resulting partial charges create a polar bond.

Formula & Notation

δ⁺—δ⁻ charge separation in bond or molecule; μ ≠ 0

Other Names / Synonyms: Electric dipole, bond dipole, molecular dipole, polar moment

Properties & Characteristics

A dipole consists of two equal and opposite charges separated by a distance. In chemistry, a bond dipole arises when two bonded atoms of different electronegativities share electrons unequally, creating partial charges (δ+ and δ−). Molecular dipoles result from the vector sum of bond dipoles. Temporary dipoles (fluctuating) give rise to London dispersion forces; permanent dipoles characterise polar molecules.

Uses & Applications

Dipole concepts explain solvent polarity, molecular spectroscopy (IR activity: vibrations that change dipole moment are IR-active), intermolecular force strength, and the behaviour of polar molecules in electric fields. They are central to understanding solubility, boiling points, and drug-receptor interactions.

Safety Information

No direct safety concern for the concept. Understanding molecular dipoles helps predict solubility in aqueous vs. organic media and guides the selection of appropriate solvents and protective equipment when working with polar toxic compounds.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Dipole
Formula δ⁺—δ⁻ charge separation in bond or molecule; μ ≠ 0
Synonyms Electric dipole, bond dipole, molecular dipole, polar moment

Frequently Asked Questions

A system consisting of two equal and opposite electric charges separated by a distance. In chemistry, a bond dipole arises when electrons are unequally shared between two atoms of different electronegativity. The resulting partial charges create a polar bond.

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