Cyclooctatetraenide anion
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 . 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 −1/4. The length of the bond between carbon atoms is 1.432 Å. There are 10 π electrons. The structure can serve as a ligand with various metals. (Wikipedia).
