Disubstituted pyridine/pyrimidine ferrocenylcomplexes have been obtained by mechanically inducedSukuzi coupling reactions in the solid state. It is shownthat the solventless process is much faster, and moreselective, than the same reaction carried out in solution.The synthesis and structure of the complex [Fe(
5-C
5H
4-4-C
5H
4N)(
5-C
5H
4-3-C
4H
3N
2)] are reported as a test case.