Methyl-Substituted Zirconocene−Bis(trimethylsilyl)acetylene Complexes (C5H5-nMen)2Zr(η2-Me3SiC⋮CSiMe3) (n = 2−5)
Methyl-Substituted Zirconocene−Bis(trimethylsilyl)acetylene Complexes (C5H5-nMen)2Zr(η2-Me3SiC⋮CSiMe3) (n = 2−5)
复制标题
甲基取代的二茂锆−双(三甲基硅基)乙炔配合物 (C5H5-nMen)2Zr(η2-Me3SiC⋮CSiMe3) (n = 2−5)
DOI:
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发表时间:
1996
期刊:
影响因子:
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通讯作者:
K. Mach
中科院分区:
文献类型:
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作者:
J. Hiller;U. Thewalt;M. Polášek;Lidmila Petrusová;V. Varga;P. Sedmera;K. Mach
The (C5H5-nMen)2Zr[η2-C2(SiMe3)2] (n = 2−5; 1,3-dimethyl, 1,2,3-trimethyl) (2C−F) complexes were prepared by the reduction of corresponding zirconocene dichlorides with magnesium in THF in the presence of bis(trimethylsilyl)acetylene (BTMSA). All of them are stable in the absence of THF. Crystal structures of (C5HMe4)2Zr[η2-C2(SiMe3)2] (2E) and (C5Me5)2Zr[η2-C2(SiMe3)2] (2F) and of the analogous titanium complexes are isomorphous. The red shift of the ν(C⋮C) vibration and the downfield shift of 13C δ(C⋮C) indicate that BTMSA in 2C−F is more strongly coordinated than in analogous titanocene complexes. The nonisolated complex (C5H4Me)2Zr[η2-C2(SiMe3)2](THF) (2B·THF) rearranges after the loss of THF to give the dimer [(η5-C5H4Me)(η1-C(SiMe3)CH(SiMe3)Zr(μ-η1:η5-C5H3Me)]2 (3B).