Metallabenzene

They can be viewed as derivatives of benzene wherein a CH center has been replaced by a transition metal complex.

Most metallabenzenes do not feature the M(CH)5 ring itself, but, instead, some of the H atoms are replaced by other substituents.

[2] Metallabenzene complexes have been classified into three varieties; in such compounds, the parent acyclic hydrocarbon ligand is viewed as the anion C5H5−.

Osmabenzene and its derivatives can be regarded as an Os(II), d6 octahedral complex.

Metallabenzenes have also been characterized with metals ruthenium,[5][6][7][8] iridium,[9][10] platinum,[11][12][13] and rhenium.