An alkylidene-tethered tantallanorbornadiene from reduction of a tantalum(phenylalkenyl)alkylidene derived from 3,3-diphenylcyclopropene ring opening by (η-C5Me4R)2Ta2(μ-X) 4 (Ta=Ta)

Jui Hsien Huang; Ting Yu Lee; Dale C. Swenson; Louis Messerle

doi:10.1016/S0020-1693(02)01351-8

An alkylidene-tethered tantallanorbornadiene from reduction of a tantalum(phenylalkenyl)alkylidene derived from 3,3-diphenylcyclopropene ring opening by (η-C₅Me₄R)₂Ta₂(μ-X) ₄ (Ta=Ta)

Jui Hsien Huang, Ting Yu Lee, Dale C. Swenson, Louis Messerle

Department of Chemistry

Research output: Contribution to journal › Article

16 Citations (Scopus)

Abstract

The terminal (diphenylalkenyl)alkylidene complexes (C₅Me₄R)Ta(CHCHCPh₂)X₂ (R=Me, Et; X=Cl, Br) are formed in moderate yields from the ring-opening reaction of 3,3-diphenylcyclopropene with the organoditantalum(III) halides (η-C₅Me₄R)₂Ta₂(μ-X) ₄. Potassium amalgam reduction of these alkenylalkylidene complexes afforded the alkylidene-tethered tantallanorbornadienes (C₅Me₄R)Ta[CHCHCPh(σ²-C₆H ₅)], which possess a bent, boat conformation σ²-arene ligand with a fold angle of 19.24(46)° (R=Me) in the solid state. ¹³C and ¹H NMR spectroscopies are consistent with a rapid flip-flop motion that averages the resonances of the σ²-phenyl group to fewer resonances than expected from the solid-state structure.

Original language	English
Pages (from-to)	209-215
Number of pages	7
Journal	Inorganica Chimica Acta
Volume	345
DOIs	https://doi.org/10.1016/S0020-1693(02)01351-8
Publication status	Published - 2003 Mar 10

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All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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Huang, J. H., Lee, T. Y., Swenson, D. C., & Messerle, L. (2003). An alkylidene-tethered tantallanorbornadiene from reduction of a tantalum(phenylalkenyl)alkylidene derived from 3,3-diphenylcyclopropene ring opening by (η-C₅Me₄R)₂Ta₂(μ-X) ₄ (Ta=Ta). Inorganica Chimica Acta, 345, 209-215. https://doi.org/10.1016/S0020-1693(02)01351-8

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title = "An alkylidene-tethered tantallanorbornadiene from reduction of a tantalum(phenylalkenyl)alkylidene derived from 3,3-diphenylcyclopropene ring opening by (η-C5Me4R)2Ta2(μ-X) 4 (Ta=Ta)",

abstract = "The terminal (diphenylalkenyl)alkylidene complexes (C5Me4R)Ta(CHCHCPh2)X2 (R=Me, Et; X=Cl, Br) are formed in moderate yields from the ring-opening reaction of 3,3-diphenylcyclopropene with the organoditantalum(III) halides (η-C5Me4R)2Ta2(μ-X) 4. Potassium amalgam reduction of these alkenylalkylidene complexes afforded the alkylidene-tethered tantallanorbornadienes (C5Me4R)Ta[CHCHCPh(σ2-C6H 5)], which possess a bent, boat conformation σ2-arene ligand with a fold angle of 19.24(46)° (R=Me) in the solid state. 13C and 1H NMR spectroscopies are consistent with a rapid flip-flop motion that averages the resonances of the σ2-phenyl group to fewer resonances than expected from the solid-state structure.",

author = "Huang, {Jui Hsien} and Lee, {Ting Yu} and Swenson, {Dale C.} and Louis Messerle",

year = "2003",

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doi = "10.1016/S0020-1693(02)01351-8",

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AU - Huang, Jui Hsien

AU - Lee, Ting Yu

AU - Swenson, Dale C.

AU - Messerle, Louis

PY - 2003/3/10

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N2 - The terminal (diphenylalkenyl)alkylidene complexes (C5Me4R)Ta(CHCHCPh2)X2 (R=Me, Et; X=Cl, Br) are formed in moderate yields from the ring-opening reaction of 3,3-diphenylcyclopropene with the organoditantalum(III) halides (η-C5Me4R)2Ta2(μ-X) 4. Potassium amalgam reduction of these alkenylalkylidene complexes afforded the alkylidene-tethered tantallanorbornadienes (C5Me4R)Ta[CHCHCPh(σ2-C6H 5)], which possess a bent, boat conformation σ2-arene ligand with a fold angle of 19.24(46)° (R=Me) in the solid state. 13C and 1H NMR spectroscopies are consistent with a rapid flip-flop motion that averages the resonances of the σ2-phenyl group to fewer resonances than expected from the solid-state structure.

AB - The terminal (diphenylalkenyl)alkylidene complexes (C5Me4R)Ta(CHCHCPh2)X2 (R=Me, Et; X=Cl, Br) are formed in moderate yields from the ring-opening reaction of 3,3-diphenylcyclopropene with the organoditantalum(III) halides (η-C5Me4R)2Ta2(μ-X) 4. Potassium amalgam reduction of these alkenylalkylidene complexes afforded the alkylidene-tethered tantallanorbornadienes (C5Me4R)Ta[CHCHCPh(σ2-C6H 5)], which possess a bent, boat conformation σ2-arene ligand with a fold angle of 19.24(46)° (R=Me) in the solid state. 13C and 1H NMR spectroscopies are consistent with a rapid flip-flop motion that averages the resonances of the σ2-phenyl group to fewer resonances than expected from the solid-state structure.

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10.1016/S0020-1693(02)01351-8