The synthesis and characterization of coordination polymers or metal organic frameworks has received a considerable amount of attention over the past decade.  As the field matures, attention is shifting towards functionalizing the overall networks via the careful choice of the starting materials.  The use of a multifunctional bridging ligand is one way in which one may introduce various functionality within the polymer, allowing for their use in heterogeneous catalysis, separations and non-linear optics.  Organometallic compounds have been widely studied due to their catalytic and redox properties. Their use as linkers in the synthesis of coordination polymers has, however, not been widely studied.  The use of [CpFe-(h⁶-arenecarboxylates)] ligands in the syntheses of a series of coordination polymers will be described.  For example, the achievement of a 3D framework [Co₃(1-H)₄(H₂O)₂(m-H₂O)₂]_¥[NO₃].S_n (S= Solvent)  from the reaction of Co(II) salt and (1) ligand will be presented. This material forms a 3D network of interconnected square grids.