How many bonds can there be between two atoms?

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Discussion Overview

The discussion revolves around the number of electrons that can be exchanged between two atoms, specifically focusing on the existence of bonds that involve sharing more than four electrons. Participants explore various examples from chemistry, including specific molecules and complexes.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions whether any elements or molecules can exchange more than four electrons per bond.
  • Another participant mentions the existence of a triple bond in acetylene as a relevant example.
  • A different participant claims that diatomic ditungsten (W2) and dimolybdenum (Mo2) may share up to twelve electrons, referencing sextuple bonds.
  • Another contributor notes that several diatomic uranium complexes are believed to have quintuple bonds and mentions that metal-metal bonded complexes can exceed triple bonds, citing research from F. A. Cotton's group on Cr-Cr and Re-Re quadruple bonds, as well as sextuple bonds.

Areas of Agreement / Disagreement

Participants present multiple competing views regarding the maximum number of electrons that can be shared between two atoms, with no consensus reached on a definitive answer.

Contextual Notes

Some claims depend on specific definitions of bonding and may involve complex coordination chemistry, which is not fully resolved in the discussion.

jerromyjon
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Are there any elements or molecules that exchange greater than 4 electrons per bond? I just thought of something off the wall and have no idea what to even google.
 
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What about a triple bond in acetylene?
 
I believe several Diatomic uranium complexes have quintuple bond.

A lot of metal-metal bonded complexes contain more than triple bond.

For example, F. A. Cotton's group reported complexes with Cr-Cr and Re-Re quadruple bond. I believe their group also reported sextuple bond as Ygggdrasil said.
 

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