1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocenium tetracyanoethylenide, [Fe(C5EtMe4)2]+[TCNE]-, a charge-transfer salt magnetic solid with a novel structural motif

T. David Harris; Michael P. Castellani; Arnold L. Rheingold; William M. Reiff; Gordon T. Yee

doi:10.1016/j.ica.2006.07.039

1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocenium tetracyanoethylenide, [Fe(C₅EtMe₄)₂]⁺[TCNE]^-, a charge-transfer salt magnetic solid with a novel structural motif

T. David Harris, Michael P. Castellani^*, Arnold L. Rheingold, William M. Reiff, Gordon T. Yee

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocene has been utilized as a one-electron donor in the synthesis of a tetracyanoethylene charge-transfer salt, [Fe(C₅EtMe₄)₂]⁺[TCNE]^-. Structural characterization shows that it adopts an arrangement of anions and cations completely different from the usual π stacking seen in analogous decamethylferrocenium compounds. The TCNE radical sits along side of the ferrocene, nearly perpendicular to the planes of the C₅ rings. The nearly square geometry of the TCNE anion creates disorder over two orientations. [Fe(C₅EtMe₄)₂]⁺[TCNE]^- is a simple paramagnet exhibiting neither long-range magnetic order nor slow paramagnetic relaxation to the lowest measured temperatures (ca. 1.8 K) as determined by both ac and dc magnetic susceptibility and Mössbauer spectroscopy (ca. 1.3 K).

Original language	English (US)
Pages (from-to)	4651-4654
Number of pages	4
Journal	Inorganica Chimica Acta
Volume	359
Issue number	14
DOIs	https://doi.org/10.1016/j.ica.2006.07.039
State	Published - Nov 1 2006

Keywords

Charge-transfer salt
Magnetism
Metallocene

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.ica.2006.07.039

Cite this

@article{d84084a4a4da4f65b1428c477e4f90d9,

title = "1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocenium tetracyanoethylenide, [Fe(C5EtMe4)2]+[TCNE]-, a charge-transfer salt magnetic solid with a novel structural motif",

abstract = "1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocene has been utilized as a one-electron donor in the synthesis of a tetracyanoethylene charge-transfer salt, [Fe(C5EtMe4)2]+[TCNE]-. Structural characterization shows that it adopts an arrangement of anions and cations completely different from the usual π stacking seen in analogous decamethylferrocenium compounds. The TCNE radical sits along side of the ferrocene, nearly perpendicular to the planes of the C5 rings. The nearly square geometry of the TCNE anion creates disorder over two orientations. [Fe(C5EtMe4)2]+[TCNE]- is a simple paramagnet exhibiting neither long-range magnetic order nor slow paramagnetic relaxation to the lowest measured temperatures (ca. 1.8 K) as determined by both ac and dc magnetic susceptibility and M{\"o}ssbauer spectroscopy (ca. 1.3 K).",

keywords = "Charge-transfer salt, Magnetism, Metallocene",

author = "Harris, {T. David} and Castellani, {Michael P.} and Rheingold, {Arnold L.} and Reiff, {William M.} and Yee, {Gordon T.}",

note = "Funding Information: We acknowledge financial support from the Donors of the Petroleum Research Fund, administered by the American Chemical Society (PRF 34614-AC), the National Science Foundation (CHE-023488 for the purchase of the SQUID and CHE-0243704 for the support of T.D.H.) and the ASPIRES program at Virginia Tech. We also thank Dr. Robert Shull of the National Institute of Standards and Technology, Gaithersburg, MD for the use of the SQUID magnetometer for gathering preliminary data and Dr. Guangbin Wang and Mr. P. Weinberger for helpful experimental assistance. ",

year = "2006",

month = nov,

day = "1",

doi = "10.1016/j.ica.2006.07.039",

language = "English (US)",

volume = "359",

pages = "4651--4654",

journal = "Inorganica Chimica Acta",

issn = "0020-1693",

publisher = "Elsevier BV",

number = "14",

}

1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocenium tetracyanoethylenide, [Fe(C₅EtMe₄)₂]⁺[TCNE]^-, a charge-transfer salt magnetic solid with a novel structural motif. / Harris, T. David; Castellani, Michael P.; Rheingold, Arnold L. et al.

In: Inorganica Chimica Acta, Vol. 359, No. 14, 01.11.2006, p. 4651-4654.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - 1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocenium tetracyanoethylenide, [Fe(C5EtMe4)2]+[TCNE]-, a charge-transfer salt magnetic solid with a novel structural motif

AU - Harris, T. David

AU - Castellani, Michael P.

AU - Rheingold, Arnold L.

AU - Reiff, William M.

AU - Yee, Gordon T.

N1 - Funding Information: We acknowledge financial support from the Donors of the Petroleum Research Fund, administered by the American Chemical Society (PRF 34614-AC), the National Science Foundation (CHE-023488 for the purchase of the SQUID and CHE-0243704 for the support of T.D.H.) and the ASPIRES program at Virginia Tech. We also thank Dr. Robert Shull of the National Institute of Standards and Technology, Gaithersburg, MD for the use of the SQUID magnetometer for gathering preliminary data and Dr. Guangbin Wang and Mr. P. Weinberger for helpful experimental assistance.

PY - 2006/11/1

Y1 - 2006/11/1

N2 - 1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocene has been utilized as a one-electron donor in the synthesis of a tetracyanoethylene charge-transfer salt, [Fe(C5EtMe4)2]+[TCNE]-. Structural characterization shows that it adopts an arrangement of anions and cations completely different from the usual π stacking seen in analogous decamethylferrocenium compounds. The TCNE radical sits along side of the ferrocene, nearly perpendicular to the planes of the C5 rings. The nearly square geometry of the TCNE anion creates disorder over two orientations. [Fe(C5EtMe4)2]+[TCNE]- is a simple paramagnet exhibiting neither long-range magnetic order nor slow paramagnetic relaxation to the lowest measured temperatures (ca. 1.8 K) as determined by both ac and dc magnetic susceptibility and Mössbauer spectroscopy (ca. 1.3 K).

AB - 1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocene has been utilized as a one-electron donor in the synthesis of a tetracyanoethylene charge-transfer salt, [Fe(C5EtMe4)2]+[TCNE]-. Structural characterization shows that it adopts an arrangement of anions and cations completely different from the usual π stacking seen in analogous decamethylferrocenium compounds. The TCNE radical sits along side of the ferrocene, nearly perpendicular to the planes of the C5 rings. The nearly square geometry of the TCNE anion creates disorder over two orientations. [Fe(C5EtMe4)2]+[TCNE]- is a simple paramagnet exhibiting neither long-range magnetic order nor slow paramagnetic relaxation to the lowest measured temperatures (ca. 1.8 K) as determined by both ac and dc magnetic susceptibility and Mössbauer spectroscopy (ca. 1.3 K).

KW - Charge-transfer salt

KW - Magnetism

KW - Metallocene

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JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

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