Synthesis of Oligoferrocenylenearylenes and the X-Ray Structure of 1,4-Bis(tricarbonylmethyltungstentetramethylcyclopentadienyl)benzene

Glen E.  Southard; M. David  Curtis

doi:10.1055/s-2002-32535

PAPER

Synthesis of Oligoferrocenylenearylenes and the X-Ray Structure of 1,4-Bis(tricarbonylmethyltungstentetramethylcyclopentadienyl)benzene

Glen E. Southard^a, M. David Curtis*^a,b
^a The Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109-1055, USA
^b The Macromolecular Science and Engineering Center, The University of Michigan, Ann Arbor, MI 48109-1055, USA
e-Mail: mdcurtis@umich.edu;

Abstract

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Abstract

Soluble oligo-(1,1′-ferrocenylene-2,5-dihexylphenylene) and oligo-(1,1′-ferrocenylene-2,5-didodecyloxylphenylene) were prepared by the Suzuki coupling of the ferrocene diboronic acid and the 1,4-phenylene diiodide. Direct reaction of lithium 1,4-bis(tetramethylcyclopentadienide)benzene or lithium 2,5-bis(tetramethylcyclopentadienide)thiophene with Fe(II) halides afforded insoluble ferrocenylenearylene oligomers, and with W(CO)₆ followed by MeI gave a model dimer whose crystal structure was determined. The magnetic properties of the ferrocene oligomers exhibit anomalous behavior that is explained in terms of the properties of the individual ferrocene groups, rather than to cooperative behavior.

Key words

organometallic polymers - ferrocene - magnetism - structure - charge transfer

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