= Three-center two-electron bond
{wiki=Three-center_two-electron_bond}
A three-center two-electron bond is a type of chemical bond that involves three atoms and two electrons. This concept is often discussed in the context of certain types of molecular structures, particularly in some clusters, carboranes, and certain compounds involving main group elements. In a typical covalent bond, two atoms share a pair of electrons. However, in a three-center two-electron bond, the two electrons are shared by three atoms instead of just two.
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