Quantum chemical calculations show that the uranium molecule U2 has a quintuple bond

@article{Gagliardi2005QuantumCC,
  title={Quantum chemical calculations show that the uranium molecule U2 has a quintuple bond},
  author={L. Gagliardi and B. Roos},
  journal={Nature},
  year={2005},
  volume={433},
  pages={848-851}
}
Covalent bonding is commonly described by Lewis's theory, with an electron pair shared between two atoms constituting one full bond. Beginning with the valence bond description for the hydrogen molecule, quantum chemists have further explored the fundamental nature of the chemical bond for atoms throughout the periodic table, confirming that most molecules are indeed held together by one electron pair for each bond. But more complex binding may occur when large numbers of atomic orbitals can… Expand
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