What is Sigma bond?
[[File:Sigma bond.svg|thumb|right|250px|A sigma bond between two atoms]] A '''sigma bond''' ('''σ bond''') is a type of [[chemical bond]]. It is the strongest one of the [[covalent]] type.<ref>{{cite book| last1 = Moore| first1 = John| last2 = Stanitski| first2 = Conrad L.| last3 = Jurs| first3 = Peter C.| title = Principles of Chemistry: The Molecular Science| url = https://books.google.com/books?id=ZOm8L9oCwLMC&pg=PA324| year = 2009| publisher = Cengage Learning| isbn = 978-0-495-39079-4 }}</ref> In a sigma bond, the [[atomic orbital]]s from two atoms which are nearby go one on top of each other. This is different from a [[pi bond]] where they touch sideways. This is why a sigma bond is stronger. Sigma bonds can involve s, p, d or f orbitals. They must however be of the right [[symmetry]] to be able to form the bond. Since the σ bond is strong, the [[molecular orbital|bonding orbital]] is low in energy. This also means that the antibonding orbital σ* is high in energy. == References == <references/> {{Chem-stub}} {{Chemical bonding theory}} {{Chemical bonds}} [[Category:Chemical bonding]]