Lone Pair
| Also Known As | Non-bonding pair, unshared electron pair, non-bonding electrons |
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What is Lone Pair?
A pair of valence electrons not involved in bonding, residing on a single atom. Lone pairs occupy more space than bonding pairs and repel bonding pairs more strongly, distorting molecular geometry. They are important in Lewis base character, hydrogen bonding, and coordination chemistry.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A pair of valence electrons not involved in bonding, residing on a single atom. Lone pairs occupy more space than bonding pairs and repel bonding pairs more strongly, distorting molecular geometry. They are important in Lewis base character, hydrogen bonding, and coordination chemistry.
Lone pair chemistry is central to: Lewis base-acid reactions (lone pair donated to Lewis acid), Brønsted base behaviour (lone pair on N accepts H⁺), nucleophilicity in organic reactions (lone pair on O, N, S, halide attacks electrophile), and coordination chemistry (ligand lone pairs bond to metal c…
Atoms with lone pairs (O, N, S) are often responsible for the toxicity of chemical compounds: sulfhydryl groups (-SH) coordinate to toxic heavy metals, amine groups bind to reactive carcinogens, oxygen lone pairs activate peroxides. Understanding lone pair reactivity helps predict toxic mechanisms.