Synthesis and coordination studies of new ferrocene-bridged bis(1,8-naphthyridine)

The new ferrocene-bridged bis(1,8-naphthyridine) ligand 1 has been prepared in a good yield from 1,1′-diacetylferrocene and 2-aminonicotinoaldehyde. The coordination with copper(I) and silver(I) gives mononuclear complexes, showing that 1 can act as a tetradentate ligand.