The Whole Story of the Two-Electron Bond, with the δ Bond as a Paradigm
- 22 April 2000
- journal article
- review article
- Published by American Chemical Society (ACS) in Accounts of Chemical Research
- Vol. 33 (7) , 483-490
- https://doi.org/10.1021/ar980116o
Abstract
It is shown that the δ bond, as found particularly in the Re26+ and Mo24+ cores of hundreds of compounds, provides a paradigm for the behavior of two-electron bonds of all types. By control of the angle of twist around the M−M axis, the strength of the bond can be systematically varied. By means of conventional electronic spectroscopy, nuclear magnetic resonance spectroscopy, and two-photon excitation spectroscopy, the entire picture of the manifold of four states for two electrons bonding two atoms, as first described by Coulson and Fischer in 1949, has been confirmed.Keywords
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