The bent metallocene geometries of potassium polyalkyl cyclopentadienyl THF solvates: monosolvated [(THF)K(μ-C5Me5)]n, disolvated [(THF)2K(μ-C5Me5)]n and the tethered olefin complex [(THF)K(μ-C5Me4SiMe2CH2CHCH2)]n

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Abstract

THF-solvated KC5Me5 and KC5Me4SiMe2CH2CHCH2 complexes crystallize with extended structures that provide information on bent metallocenes containing potassium, [(μ-C5R5)K(μ-C5R5)]−. The substructures of [(THF)K(μ-C5Me5)]n, [(THF)2K(μ-C5Me5)]n, and [(THF)K(μ-C5Me4SiMe2CH2CHCH2)]n display (μ-C5R5)K(μ-C5R5) angles of 137.9–143.7°. The olefin substituent in [(THF)K(μ-C5Me4SiMe2CH2CHCH2)]n approaches potassium with K⋯C distances of 3.58 and 4.20 Å.
The polymeric solid state structures of the title compounds generate [(μ-C5R5)K(μ-C5R5)]− substructures which have bent metallocene geometries as shown. A monosolvate, a disolvate and a monosolvate with a nearby olefin are reported.
Original languageEnglish
Pages (from-to)252-257
JournalJournal of Organometallic Chemistry
Volume649
Issue number2
DOIs
StatePublished - Apr 2002
Externally publishedYes

Funding

For support of this research, we thank the Division of Chemical Sciences of the Office of Basic Energy Sciences of the Department of Energy.

Keywords

  • Potassium
  • Cyclopentadienide
  • Bent metallocenes
  • Tethered olefins

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