 Azaferrocene

A ferrocene analogue with a pyrrolyl ring replacing one cyclopentadienyl ring, $\mathrm{Fe}({\eta }^5-{\mathrm{C}}_5{\mathrm{H}}_5)({\eta }^5-{\mathrm{C}}_4{\mathrm{H}}_4\mathrm{N})$. Both anionic rings are six-electron donors.