REACTION OF TRICARBONYLCYCLOPENTADIENYL M OLYBDENUM ANION WITH 1,3-DIHALOPROPANE

Reaction of tricarbonylcyclopentadienyl molybdenum anion with X(CH2)(3 )X(X = Br, I) in diglyme gave the cyclic carbene of molybdenum complex -CpMoX(CO)(2) . CO(CH2)(2)CCH2. The similar reaction of sila-bridged b iscyclopentadienyltricarbonyl molybdenum anion with 1,3-dihalopropane proceeds smoothly to afford the corresponding sila-bridged bis [cyclic carbene molybdenum] complex, E[C(5)H(4)MoX(CO)(2) . CO(CH2)(2)CH2](2) (E = Me(2)Si, Me(2)SiSiMe(2), Me(2)SiOSiMe(2)). The crystal structure of one (X = I) of the latter complexes was determined by X-ray crysta llography. The crystal is triclinic, space group <P(1)over bar> with a = 0.818 8(1) nm, b = 1.045 4(3) nm, c = 2.332 5(4) nm, alpha = 94.14( 2)degrees, beta = 94.07(1)degrees, gamma = 102.48(2)degrees, V = 1.930 6 nm(3), Z = 2, D-c = 1.854 g/cm(3).