Angewandte Chemie International Edition in English

Volume 27, Issue 8 pp. 1099-1101

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Pentadienyl, a More Reactive and More Strongly Bound Ligand Than Cyclopentadienyl^†

Enrique Meléndez,

Enrique Meléndez

Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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Dr. Atta M. Arif,

Dr. Atta M. Arif

Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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Prof. Dr. Manfred L. Ziegler,

Corresponding Author

Prof. Dr. Manfred L. Ziegler

Anorganisch-chemisches Institut der Universität, Im Neuenheimer Feld 270, D-6900 Heidelberg 1 (FRG)

Manfred L. Ziegler, Anorganisch-chemisches Institut der Universität, Im Neuenheimer Feld 270, D-6900 Heidelberg 1 (FRG)

Richard D. Ernst, Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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Prof. Richard D. Ernst,

Corresponding Author

Prof. Richard D. Ernst

Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

Manfred L. Ziegler, Anorganisch-chemisches Institut der Universität, Im Neuenheimer Feld 270, D-6900 Heidelberg 1 (FRG)

Richard D. Ernst, Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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Enrique Meléndez,

Enrique Meléndez

Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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Dr. Atta M. Arif,

Dr. Atta M. Arif

Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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Prof. Dr. Manfred L. Ziegler,

Corresponding Author

Prof. Dr. Manfred L. Ziegler

Anorganisch-chemisches Institut der Universität, Im Neuenheimer Feld 270, D-6900 Heidelberg 1 (FRG)

Manfred L. Ziegler, Anorganisch-chemisches Institut der Universität, Im Neuenheimer Feld 270, D-6900 Heidelberg 1 (FRG)

Richard D. Ernst, Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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Prof. Richard D. Ernst,

Corresponding Author

Prof. Richard D. Ernst

Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

Manfred L. Ziegler, Anorganisch-chemisches Institut der Universität, Im Neuenheimer Feld 270, D-6900 Heidelberg 1 (FRG)

Richard D. Ernst, Department of Chemistry, University of Utah, Salt Lake City, UT 84 112 (USA)

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First published: August 1988

https://doi.org/10.1002/anie.198810991

Citations: 29

^†

This work was supported by the National Science Foundation (USA).

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Direct comparison of the cyclopentadienyl ligand with its open-chain counterpart has been accomplished using complex 1, which contains both ligands. The Ti-C bonds to the acyclic ligand are 0.106 Å shorter than those to the cyclic ligand. Although this finding indicates that the bonds to the pentadienyl ligand are stronger, reaction of 1 with acetonitrile occurs nonetheless at this ligand. The aromatic character of C₅H urn:x-wiley:05700833:media:ANIE198810991:tex2gif-stack-1 offers a possible explanation for this apparent contradiction. The aromaticity results in resistance to chemical change; that is, both formation of stronger bonds and coupling with electrophiles are disfavored.

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Volume27, Issue8

August 1988

Pages 1099-1101

Pentadienyl, a More Reactive and More Strongly Bound Ligand Than Cyclopentadienyl^†

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Pentadienyl, a More Reactive and More Strongly Bound Ligand Than Cyclopentadienyl†

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Pentadienyl, a More Reactive and More Strongly Bound Ligand Than Cyclopentadienyl^†