The Reaction of Tris(trimethylsilyl) cyclopentadiene with Hexacarbonyl Molybdenum

Abstract

Abstract: The xylene solution of tris (trimethylsilyl)cyclopentadiene and Mo(CO)₆ was refluxed for 8 h. The reaction was stopped at the formation of the intermediate, mononuclear molybdenum hydride η⁵-[(Me₃Si)_nC₅H_5-n]Mo (CO)₃H (n=2, 3) (Ⅰ). The reaction can not proceed further to form the binuclear(Mo-Mo) product. It is probably due to the steric effect of three silyl groups which hindered the further progress of the reaction. Desilylation happened while the reaction was proceeding. Compound Ⅰ was not isolated from the xylene solution and reacted immediately with CCl₄, NBS and MeI respectively to give the corresponding molybdenum halides η⁵-[(Me₃Si)_nC₅H_5-n]Mc (CO)₃,X [n=3; X: Cl(1), Br(2), I(3). n=2; X: Cl(4), Br(5), I(6)]. Compounds 4, 5, and 6 are desilylation products. The molecular structures of 1-6 were characterized by elemental analyses, IR and ¹H NMR spectra. The crystal structure of 1 was determined by X-ray diffraction.

Key words: Binuclear molybdenum compound, Molybdenum hydride, Desilylation, Crystal structure

CLC Number:

O627.41

TrendMD:

XU Shan-Sheng, GONG Jun-Fang, ZHOU Xiu-Zhong . The Reaction of Tris(trimethylsilyl) cyclopentadiene with Hexacarbonyl Molybdenum[J]. Chem. J. Chinese Universities, 1998, 19(1): 70.

References

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