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

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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 languageEnglish
Pages (from-to)209-215
Number of pages7
JournalInorganica Chimica Acta
Volume345
DOIs
Publication statusPublished - 2003 Mar 10

Fingerprint

alkylidene
Tantalum
tantalum
solid state
mercury amalgams
Mercury amalgams
flip-flops
Flip flop circuits
rings
boats
Boats
Nuclear magnetic resonance spectroscopy
halides
Potassium
Conformations
potassium
Ligands
nuclear magnetic resonance
ligands
spectroscopy

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

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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 = "Jui-Hsien Huang and Lee, {Ting Yu} and Swenson, {Dale C.} and Louis Messerle",
year = "2003",
month = "3",
day = "10",
doi = "10.1016/S0020-1693(02)01351-8",
language = "English",
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pages = "209--215",
journal = "Inorganica Chimica Acta",
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TY - JOUR

T1 - 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)

AU - Huang, Jui-Hsien

AU - Lee, Ting Yu

AU - Swenson, Dale C.

AU - Messerle, Louis

PY - 2003/3/10

Y1 - 2003/3/10

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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