HIGH-NUCLEARITY OXOMOLYBDENUM(V) COMPLEXES

During the past decade, a new family of high nuclearity oxometalates has emerged, oxomolybdenum(V) complexes whose d-electrons are localized in Mo(v)-Mo(v) bonds. The structure types of all known complexes in this family are reviewed, including nine different (Mo(V)-Mo(V)) monomer, dimer, trimer, tetramer, hexamer, and octadecamer structures, with an emphasis on high-nuclearity structures. In each case, oxomolybdenum(V) core structures are identified and analyzed with regard to degree of polymerization, degree of condensation, and oxygen packing, and an effort is made to identify smaller complexes as subunits of larger structures.