Boratabenzene is the heteroaromatic anion with the formula [C5H5BH]−.

Derivatives of boratabenzene are ligands akin to cyclopentadienyl anion.

sandwich or half-sandwich type complexes of many transition metals have been reported.

[2][3] Electronically related heterocycles are adducts of borabenzene.

The adduct C5H5B·pyridine exhibits properties of boratabenzene anion, i.e., it has the character C5H5B−-N+C5H5.