(Cobaltoceniumyl-amido)-pyridinium hexa-fluorido-phosphate.

The title compound, [Co(C 5 H 5 )(C 10 H 9 N 2 )]PF 6 , was synthesized from deproton-ated 1-amino-pyridinium iodide, followed by microwave-assisted nucleophilic aromatic substitution of iodo-cobaltocenium iodide. After anion exchange with potassium hexa-fluorido-phosphate, the title compound crystallizes as orange prisms in the space group Pc . This very stable pyridine nitrene adduct is the first example of a cobaltocenium derivative, formally containing a nitrene nitro-gen species.