Back رابطة ثلاثية المركز ثنائية الإلكترون Arabic 2-Elektronen-3-Zentren-Bindung German Enlace de tres centros y dos electrones Spanish پیوند دو الکترون -سه مرکزی Persian Liaison à trois centres et deux électrons French Ikatan tiga-pusat dua-elektron ID Legame a tre centri e due elettroni Italian 三中心二電子結合 Japanese Трицентрична двоелектронска врска Macedonian 3-centra-2-elektronbinding Dutch
A three-center two-electron (3c–2e) bond is an electron-deficient chemical bond where three atoms share two electrons. The combination of three atomic orbitals form three molecular orbitals: one bonding, one non-bonding, and one anti-bonding. The two electrons go into the bonding orbital, resulting in a net bonding effect and constituting a chemical bond among all three atoms. In many common bonds of this type, the bonding orbital is shifted towards two of the three atoms instead of being spread equally among all three. Example molecules with 3c–2e bonds are the trihydrogen cation (H+
3) and diborane (B
2H
6). In these two structures, the three atoms in each 3c-2e bond form an angular geometry, leading to a bent bond.