In recent years, remarkable progress has been made in the design of functional framework materials via the reaction of various transition metal ions and simple organic bridging ligands.  In this context, the use of organometallic bridging ligands, which have the obvious potential to introduce unique functionality, have been relatively unexplored.  The synthesis and characterization of a series of metal-organometallic framework (MOMF) materials, derived from facially metalated aryl carboxylates, will be presented.  For example, the reaction of Co(NO₃)₂·6H₂O with [CpFe]⁺-metalated 1,4-benzenedicarboxylic acid (1) results in [Co₃(1-H)₄(H₂O)₂(m-H₂O)₂][NO₃]₂ (2), a 3D framework material constructed of square grid cobalt-carboxylate networks that are interconnected in the third dimension through additional cobalt ions.