Dimer
| Formula / Notation | 2A ⇌ A₂ (e.g., 2NO₂ ⇌ N₂O₄) |
|---|---|
| Also Known As | Molecular dimer, homodimer, dimerisation product, bimolecular association |
What is Dimer?
A molecule formed by the combination of two identical or similar monomer units. Dimers can be held together by covalent bonds or weaker intermolecular forces. For example, acetic acid forms dimers in the gas phase through hydrogen bonding.
Formula & Notation
Other Names / Synonyms: Molecular dimer, homodimer, dimerisation product, bimolecular association
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 molecule formed by the combination of two identical or similar monomer units. Dimers can be held together by covalent bonds or weaker intermolecular forces. For example, acetic acid forms dimers in the gas phase through hydrogen bonding.
Dimers are important in catalysis (many enzymes are dimers), polymer chemistry (dimerisation as a side reaction), atmospheric chemistry (dinitrogen tetroxide N₂O₄ ⇌ 2NO₂ equilibrium important in rocket propellants), and in materials science (dimer formation in liquid crystals and self-assembled mono…
Some dimers are more hazardous than the monomer: dinitrogen tetroxide (N₂O₄) is a toxic oxidiser used as rocket fuel. Cyclopentadiene dimerises to dicyclopentadiene; the monomer can be obtained by thermal cracking, but it is flammable and irritant.
The formula or notation for Dimer is: 2A ⇌ A₂ (e.g., 2NO₂ ⇌ N₂O₄)