Attachment of the Bulky Bidentate Ligand C(SiMe3) 2SiMe2CH2CH2Me2 Si(Me3Si)2C to K, Zn, Sn, and Yb. Crystal Structures of LnMC(SiMe3)2SiMe2CH 2CH2Me2Si(Me3Si)2 CMLn

Colin Eaborn, Michael S. Hill, Peter B. Hitchcock, J. D. Smith, Suobo Zhang, Tomasz Ganicz

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18 Citations (Scopus)

Abstract

Reaction of the lithate [Li(THF)4][CH2SiMe2C(SiMe3) 2LiC(SiMe3)2SiMe2CH2] with KOtBu in THF has given the organopotassium reagent (THF)2KC(SiMe3)2SiMe2CH 2CH2Me2Si(Me3-Si) 2CK(THF)2, 8, and reaction of HC(SiMe3)2SiMe2CH2CH 2Me2Si(Me3Si)2CH with KMe in benzene has given the related ether-free species (C6H6)2KC(SiMe3) 2SiMe2CH2CH2Me 2Si-(Me3Si)2CK(C6H6) 2, 7. The structures of 7 and 8 have been confirmed by X-ray studies which indicate that both compounds show K⋯Me contacts in the range 3.3-3.5 Å. The ether-free reagent 7 reacted with YbI2 in benzene to give the cyclic Yb(II) derivative CH2SiMe2C(SiMe3)2-YbC(SiMe 3)2SiMe2CH2, which was found to be somewhat more stable toward Et2O than the previously studied Yb{C(SiMe3)3}2. Reaction of the lithate [Li(TMEDA)2]CH2SiMe2C(SiMe3) 2-LiC(SiMe3)2SiMe2CH2] (2a) with ZnCl2 in THF gave a cyclic compound CH2SiMe2C(SiMe3)2-ZnC(SiMe 3)2SiMe2CH2, which is stable toward boiling aqueous THF. An X-ray study shows that the angle at Zn is 170°. In contrast, the reactions of 2a with SnCl4 or Me2SnCl2 gave linear species ClX2SnC(SiMe3)2SiMe2CH 2CH2Me2Si(Me3Si) 2CSnX2Cl, X = Cl or Me, the structures of which were confirmed by single-crystal X-ray diffraction studies.

Original languageEnglish
Pages (from-to)2342-2348
Number of pages7
JournalOrganometallics
Volume18
Issue number12
Publication statusPublished - 7 Jun 1999

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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