What is the Difference Between HOMO and LUMO?
🆚 Go to Comparative Table 🆚The terms HOMO and LUMO refer to molecular orbitals in quantum chemistry, but the search results provided do not directly address these concepts. Instead, the search results mainly discuss homologous and analogous traits in biology, which are unrelated to HOMO and LUMO.
Homologous traits share a similar embryonic origin and are inherited from a common ancestor, while analogous traits have a similar function but do not share a common ancestry. Examples of homologous structures include the bones in a whale's front flipper and the bones in a human arm, while analogous structures include the wings of a butterfly and the wings of a bird.
Comparative Table: HOMO vs LUMO
The HOMO (Highest Occupied Molecular Orbital) and LUMO (Lowest Unoccupied Molecular Orbital) are concepts in molecular orbital theory that describe the energy levels of orbitals in a molecule. The energy difference between the HOMO and LUMO, known as the HOMO-LUMO energy gap, is an important parameter in understanding the reactivity of a molecule. Here is a table summarizing the differences between HOMO and LUMO:
Property | HOMO | LUMO |
---|---|---|
Definition | Highest energy molecular orbital with electrons in it | Lowest energy molecular orbital without electrons in it |
Energy Level | High energy level | Low energy level |
Role in Reactions | Influences the reactivity of a molecule, as it can donate electron density to another molecule | Can accept electron density from another molecule, making the molecule with the lower LUMO energy level a stronger oxidizing agent |
The HOMO-LUMO energy gap can be calculated using density functional theory (DFT) methods. It is also possible to measure the gap using UV-Vis spectroscopy or a spectrophotometer, which can provide information about the wavelengths a compound absorbs.
- Homolysis vs Heterolysis
- Homodimer vs Heterodimer
- Lux vs Lumen
- Homolytic vs Heterolytic Bond Dissociation Energy
- Homoleptic vs Heteroleptic Complexes
- Fluorescence vs Luminescence
- Luminance vs Illuminance
- Homonuclear vs Heteronuclear Diatomic Molecules
- Photoluminescence vs Electroluminescence
- Candela vs Lumen
- Molecule vs Lattice
- Homolytic vs Heterolytic Fission
- Brightness vs Luminosity
- Homothallic vs Heterothallic Fungi
- Photoluminescence vs Fluorescence
- Homosexual vs Heterosexual
- Homocyclic vs Heterocyclic Compounds
- Bond Enthalpy vs Lattice Enthalpy
- Cathodoluminescence vs Photoluminescence