antibonding orbital

antibonding orbital

[′an·tē′bänd·iŋ ′ȯr·bə·təl]
(physics)
An atomic or molecular orbital whose energy increases as atoms are brought closer together, indicating a net repulsion rather than a net attraction and chemical bonding.
References in periodicals archive ?
the antibonding orbital may get partially filled (such as in CO and [N.
The most important electronic energy changes occurring when polymers absorb UV radiation include 1) transitions between bonding orbitals and antibonding orbitals or 2) promotion of non-bonding electrons (unshared electrons) into antibonding sigma or antibonding pi orbitals (11).