Dimeric and Cyclotrimeric Piano-Stool Vanadium(III) Dihalides with Unusual Differences in V−V Distance and Magnetochemistry. Syntheses, Structures, and Reactivities of (η-C5Me4R)2V2(μ-Br)4 and the Trivanadium Cluster (η-C5Me4R)3V3(μ-Cl)6, New Mid-Valent Organovanadium Synthons

Ching Ting; Michael S Hammer; Norman C Baenziger; Louis Messerle; James Deak; Shi LI; Michael Mcelfresh

doi:10.1021/om970045h

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Dimeric and Cyclotrimeric Piano-Stool Vanadium(III) Dihalides with Unusual Differences in V−V Distance and Magnetochemistry. Syntheses, Structures, and Reactivities of (η-C5Me4R)2V2(μ-Br)4 and the Trivanadium Cluster (η-C5Me4R)3V3(μ-Cl)6, New Mid-Valent Organovanadium Synthons

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Dimeric and Cyclotrimeric Piano-Stool Vanadium(III) Dihalides with Unusual Differences in V−V Distance and Magnetochemistry. Syntheses, Structures, and Reactivities of (η-C5Me4R)2V2(μ-Br)4 and the Trivanadium Cluster (η-C5Me4R)3V3(μ-Cl)6, New Mid-Valent Organovanadium Synthons

Ching Ting, Michael S Hammer, Norman C Baenziger, Louis Messerle, James Deak, Shi LI and Michael Mcelfresh

Organometallics, Vol.16(9), pp.1816-1818

04/29/1997

DOI: 10.1021/om970045h

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Abstract

Reductive oligomerization of (C5Me4R)VX3 or addition of (C5Me4R)SnBu3 to VX3L3 (L = thf, tht) yields the (peralkylcyclopentadienyl)vanadium(III) halides (η5-C5Me4R)2V 2(μ-Br)4 and (η5-C5Me4R)3V 3(μ-Cl)6 (R = Me, Et), which can be halogenated to afford (C5Me4R)VX3. Paramagnetic (C5Me4Et)2V2(μ-Br)4 is a four-legged pianostool dimer in the solid state with a nominal V-V bond (2.565(1) Å), while the spin-frustrated, antiferromagnetic (C5Me4Et)3V3(μ-Cl)6 is a piano-stool cyclotrimer with two iμ-chlorines per nonbonded V⋯V edge (3.3732[63] Å).

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Title: Subtitle: Dimeric and Cyclotrimeric Piano-Stool Vanadium(III) Dihalides with Unusual Differences in V−V Distance and Magnetochemistry. Syntheses, Structures, and Reactivities of (η-C5Me4R)2V2(μ-Br)4 and the Trivanadium Cluster (η-C5Me4R)3V3(μ-Cl)6, New Mid-Valent Organovanadium Synthons
Creators: Ching Ting - Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242
Michael S Hammer - Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242
Norman C Baenziger - Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242
Louis Messerle - Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242
James Deak - Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242
Shi LI - Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242
Michael Mcelfresh - Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242
Resource Type: Journal article
Publication Details: Organometallics, Vol.16(9), pp.1816-1818
Publisher: American Chemical Society
DOI: 10.1021/om970045h
ISSN: 0276-7333
eISSN: 1520-6041
Language: English
Date published: 04/29/1997
Academic Unit: Radiology; Chemistry
Record Identifier: 9984216590702771

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