Synthesis 2002(9): 1177-1184
DOI: 10.1055/s-2002-32535
PAPER
© Georg Thieme Verlag Stuttgart · New York

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

Glen E. Southarda, 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;
Further Information

Publication History

Received 17 March 2002
Publication Date:
28 June 2002 (online)

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.