Synthesis and Characterization of a New Class of Mu(3)-Oh-Bridged Trimers That Contain Octahedrally Coordinated Divalent Metal-Ions Bridged by 3 Acetate Ligands and a Unique Catecholate Ligand - Solid-State Molecular-Structures of the ((PY)(5)M(3)(II)(Oac)(3)(Mu(3)-Oh)((Cat)) Complexes (M=mn(II), Fe(II), Co(II), Ni(II))