Sigma bond
Sigma bond
A Sigma bond (pronunciation: /ˈsɪɡmə bɒnd/) is a type of chemical bond that is formed when two atomic orbitals combine to form a molecular orbital that is symmetrical around the axis connecting the two atomic nuclei. The term "sigma bond" is derived from the Greek letter sigma (Σ, σ), which is used in mathematics and physics to denote summation or to signify the first, primary, or main part of something.
Etymology
The term "sigma bond" was first used in the early 20th century by chemists who were studying the nature of chemical bonds. The word "sigma" is derived from the Greek letter "sigma", which is used in mathematics and physics to denote summation or to signify the first, primary, or main part of something. The word "bond" comes from the Old English "bend", which means a binding or a fastening.
Related terms
- Covalent bond: A type of chemical bond that involves the sharing of electron pairs between atoms.
- Pi bond: A type of chemical bond that is formed by the overlap of atomic orbitals that are in contact through two areas of overlap.
- Molecular orbital: A mathematical function describing the wave-like behavior of an electron in a molecule.
- Atomic orbital: A mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom.
See also
External links
- Medical encyclopedia article on Sigma bond
- Wikipedia's article - Sigma bond
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