Английская Википедия:Cyclooctatetraenide anion

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Шаблон:Short description Шаблон:Chembox

In chemistry, the cyclooctatetraenide anion or cyclooctatetraenide, more precisely cyclooctatetraenediide, is an aromatic species with a formula of [C8H8]2− and abbreviated as COT2−. It is the dianion of cyclooctatetraene. Salts of the cyclooctatetraenide anion can be stable, e.g., Dipotassium cyclooctatetraenide or disodium cyclooctatetraenide. More complex coordination compounds are known as cyclooctatetraenide complexes, such as the actinocenes.

The structure is a planar symmetric octagon stabilized by resonance, meaning each atom bears a charge of −Шаблон:Sfrac. The length of the bond between carbon atoms is 1.432 Å. There are 10 π electrons.[1] The structure can serve as a ligand with various metals.

List of salts

name formula CAS remarks references
Samarium(II) cyclooctatetraenide Sm(C8H8) [2]
Dipotassium samarium(II) cyclooctatetraenide K2Sm(C8H8)2 [2]
Neodymium cyclooctatetraenide Nd(C8H8)2
Terbium cyclooctatetraenide Tb(C8H8)2
Protactinocene (Pa(C8H8)2)
Thorocene (Th(C8H8)2)
Uranocene U(C8H8)2
Neptunocene (Np(C8H8)2)
Plutonocene (Pu(C8H8)2)
Cerocene Ce3+(C8H81.5-)2 37205-27-9 [3]

See also

References

Шаблон:Reflist

  1. Шаблон:Cite journal
  2. 2,0 2,1 Шаблон:Cite journal
  3. Marc D. Walter, Corwin H. Booth, Wayne W. Lukens, and Richard A. Andersen. Organometallics 2009, 28, 3, 698–707. Шаблон:Doi