[5-5]Bitrovacene, (μ-η5:η5-Fulvalenediyl)bis[(η 7-cycloheptatrienyl)vanadium]: Synthesis, Structure, and Intermetallic Communication

Christoph Elschenbroich; Olav Schiemann; Olaf Burghaus; Klaus Harms; Jürgen Pebler

doi:10.1021/om9902232

[5-5]Bitrovacene, (μ-η⁵:η⁵-Fulvalenediyl)bis[(η ⁷-cycloheptatrienyl)vanadium]: Synthesis, Structure, and Intermetallic Communication

Christoph Elschenbroich, Olav Schiemann, Olaf Burghaus, Klaus Harms, Jürgen Pebler

Philipps-Universität Marburg

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

36 Scopus citations

Abstract

Lithiation of trovacene, (η⁷-C₇H₇)V(η⁵-C ₅H₅), Li/I exchange, and Pd(dppf)Cl₂-catalyzed homocoupling affords [5-5]bitrovacene 5^2·. Intermetallic communication manifests itself in typical biradical features of the EPR spectrum and in the resolution of redox splittings of 147 mV for the two subsequent oxidations and 224 mV for the reductions, respectively. 5^2· adopts a trans conformation in the single crystal (X-ray diffraction) as well as in rigid solution (EPR spectroscopy). A magnetic susceptibility study of 5^2· reveals weak antiferromagnetic coupling (J = -2.78 cm^-1) of the two V(d⁵) centers.

Original language	English
Pages (from-to)	3273-3277
Number of pages	5
Journal	Organometallics
Volume	18
Issue number	17
DOIs	https://doi.org/10.1021/om9902232
State	Published - 16 Aug 1999
Externally published	Yes

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title = "[5-5]Bitrovacene, (μ-η5:η5-Fulvalenediyl)bis[(η 7-cycloheptatrienyl)vanadium]: Synthesis, Structure, and Intermetallic Communication",

abstract = "Lithiation of trovacene, (η7-C7H7)V(η5-C 5H5), Li/I exchange, and Pd(dppf)Cl2-catalyzed homocoupling affords [5-5]bitrovacene 52·. Intermetallic communication manifests itself in typical biradical features of the EPR spectrum and in the resolution of redox splittings of 147 mV for the two subsequent oxidations and 224 mV for the reductions, respectively. 52· adopts a trans conformation in the single crystal (X-ray diffraction) as well as in rigid solution (EPR spectroscopy). A magnetic susceptibility study of 52· reveals weak antiferromagnetic coupling (J = -2.78 cm-1) of the two V(d5) centers.",

author = "Christoph Elschenbroich and Olav Schiemann and Olaf Burghaus and Klaus Harms and J{\"u}rgen Pebler",

year = "1999",

month = aug,

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doi = "10.1021/om9902232",

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TY - JOUR

T1 - [5-5]Bitrovacene, (μ-η5:η5-Fulvalenediyl)bis[(η 7-cycloheptatrienyl)vanadium]

T2 - Synthesis, Structure, and Intermetallic Communication

AU - Elschenbroich, Christoph

AU - Schiemann, Olav

AU - Burghaus, Olaf

AU - Harms, Klaus

AU - Pebler, Jürgen

PY - 1999/8/16

Y1 - 1999/8/16

N2 - Lithiation of trovacene, (η7-C7H7)V(η5-C 5H5), Li/I exchange, and Pd(dppf)Cl2-catalyzed homocoupling affords [5-5]bitrovacene 52·. Intermetallic communication manifests itself in typical biradical features of the EPR spectrum and in the resolution of redox splittings of 147 mV for the two subsequent oxidations and 224 mV for the reductions, respectively. 52· adopts a trans conformation in the single crystal (X-ray diffraction) as well as in rigid solution (EPR spectroscopy). A magnetic susceptibility study of 52· reveals weak antiferromagnetic coupling (J = -2.78 cm-1) of the two V(d5) centers.

AB - Lithiation of trovacene, (η7-C7H7)V(η5-C 5H5), Li/I exchange, and Pd(dppf)Cl2-catalyzed homocoupling affords [5-5]bitrovacene 52·. Intermetallic communication manifests itself in typical biradical features of the EPR spectrum and in the resolution of redox splittings of 147 mV for the two subsequent oxidations and 224 mV for the reductions, respectively. 52· adopts a trans conformation in the single crystal (X-ray diffraction) as well as in rigid solution (EPR spectroscopy). A magnetic susceptibility study of 52· reveals weak antiferromagnetic coupling (J = -2.78 cm-1) of the two V(d5) centers.

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[5-5]Bitrovacene, (μ-η⁵:η⁵-Fulvalenediyl)bis[(η ⁷-cycloheptatrienyl)vanadium]: Synthesis, Structure, and Intermetallic Communication

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