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)

Abstract

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.