Syntheses and structural characterizations of novel tungsten and molybdenum complexes of fullerene [M(η2-C60)(CO)2(phen)(dbm)]· 2C6H6·C5H12 (M = W or Mo, phen = 1,10-phenanthroline, dbm = dibutyl maleate)
Novel tungsten and molybdenum complexes of fullerene [M(η2-C60)(CO)2(phen)(dbm)]·C6H6·C5H12 (M = W 1 or Mo 2; dbm = dibutyl maleate; phen = 1,10-phenanthroline) have been synthesized by heating a solution of C60 with [M(CO)4(phen)] and dbm in toluene followed by chromatography over silica gel. They have been characterized by chemical analysis, IR, UV/VIS, 1H and 13C NMR spectroscopy and single-crystal X-ray diffraction analysis. The complexes are isomorphous. The metal atom co-ordination is distorted octahedral with the two CO groups and phen in the equatorial plane and the metal binds in an η2 fashion to C–C bonds of C60 and dbm. Both complexes are remarkably stable in air and have unusually good solubility.