SYNTHESES AND STRUCTURAL CHARACTERIZATIONS OF NOVEL TUNGSTEN AND MOLYBDENUM COMPLEXES OF FULLERENE 2)(PHEN)(DBM)]CENTER-DOT-2C(6)H(6)CENTER-DOT-C5H12 (M = W OR MO, PHEN EQUALS 1,10-PHENANTHROLINE, DBM = DIBUTYL MALEATE)

Novel tungsten and molybdenum complexes of fullerene [M(eta(2)-C-60)(C O)(2)(phen)(dbm)]. C6H6 . C5H12 (M = W 1 or Mo 2; dbm = dibutyl maleat e; phen = I,10-phenanthroline) have been synthesized by heating a solu tion of C-60 with [M(CO)(4)(phen)] and dbm in toluene followed by chro matography over silica gel. They have been characterized by chemical a nalysis, IR, UV/VIS, H-1 and C-13 NMR spectroscopy and single-crystal X-ray diffraction analysis. The complexes are isomorphous. The metal a tom co-ordination is distorted octahedral with the two CO groups and p hen in the equatorial plane and the metal binds in an eta(2) fashion t o C-C bonds of C-60 and dbm. Both complexes are remarkably stable in a ir and have unusually good solubility.