Synthesis And Structures Of 1,1 ',2-Tribromoferrocene, 1,1 ',2,2 '-Tetrabromoferrocene, 1,1 ',2,2 '-Tetrabromoruthenocene: Expanding The Range Of Precursors For The Metallocene Chemist'S Toolkit

The synthesis, characterisation, and isolation of 1,1',2-tribromoferrocene and 1,1',2,2'-tetrabromoferrocene, which are key synthons in ferrocene chemistry, are described. These compounds are prepared using a-halide assisted lithiation. The crystal structures of 1,1',2-tribromoferrocene, 1,1',2,2'-tetrabromoferrocene, 1,1'-dibromoruthenocene, and 1,1',2,2'-tetrabromoruthenocene have been determined and are reported together with a brief discussion of the intramolecular forces involved in the crystal structures.