Alkane metathesis with the tantalum methylidene [(≡SiO)Ta(=CH2)Me2]/[(≡SiO)2Ta(=CH2)Me] generated from well-defined surface organometallic complex [(≡SiO)TaVMe4]

Yin Chen; Edy Abou-Hamad; Ali Imad Ali Hamieh; Bilel Hamzaoui; Lyndon Emsley; Jean-Marie Basset

doi:10.1021/ja5113468

Alkane metathesis with the tantalum methylidene [(≡SiO)Ta(=CH2)Me2]/[(≡SiO)2Ta(=CH2)Me] generated from well-defined surface organometallic complex [(≡SiO)TaVMe4]

Yin Chen, Edy Abou-Hamad, Ali Imad Ali Hamieh, Bilel Hamzaoui, Lyndon Emsley, Jean-Marie Basset

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

62 Scopus citations

Abstract

By grafting TaMe5 on Aerosil700, a stable, well-defined, silica-supported tetramethyl tantalum(V) complex, [(≡SiO)TaMe4], is obtained on the silica surface. After thermal treatment at 150 °C, the complex is transformed into two surface tantalum methylidenes, [(≡SiO)2Ta(=CH2)Me] and [(≡SiO)Ta(=CH2)Me2], which are active in alkane metathesis and comparable to the previously reported [(≡SiO)2TaHx]. Here we present the first experimental study to isolate and identify a surface tantalum carbene as the intermediate in alkane metathesis. A systematic experimental study reveals a new reasonable pathway for this reaction.

Original language	English (US)
Pages (from-to)	588-591
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	137
Issue number	2
DOIs	https://doi.org/10.1021/ja5113468
State	Published - Jan 5 2015

ASJC Scopus subject areas

Biochemistry
Colloid and Surface Chemistry
General Chemistry
Catalysis

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@article{bbd39080fda046c996ba24cdf79452ac,

title = "Alkane metathesis with the tantalum methylidene [(≡SiO)Ta(=CH2)Me2]/[(≡SiO)2Ta(=CH2)Me] generated from well-defined surface organometallic complex [(≡SiO)TaVMe4]",

abstract = "By grafting TaMe5 on Aerosil700, a stable, well-defined, silica-supported tetramethyl tantalum(V) complex, [(≡SiO)TaMe4], is obtained on the silica surface. After thermal treatment at 150 °C, the complex is transformed into two surface tantalum methylidenes, [(≡SiO)2Ta(=CH2)Me] and [(≡SiO)Ta(=CH2)Me2], which are active in alkane metathesis and comparable to the previously reported [(≡SiO)2TaHx]. Here we present the first experimental study to isolate and identify a surface tantalum carbene as the intermediate in alkane metathesis. A systematic experimental study reveals a new reasonable pathway for this reaction.",

author = "Yin Chen and Edy Abou-Hamad and Hamieh, {Ali Imad Ali} and Bilel Hamzaoui and Lyndon Emsley and Jean-Marie Basset",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: We thank KAUST for the generous financial support. This paper is dedicated to Yves Chauvin.",

year = "2015",

month = jan,

day = "5",

doi = "10.1021/ja5113468",

language = "English (US)",

volume = "137",

pages = "588--591",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

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}

Alkane metathesis with the tantalum methylidene [(≡SiO)Ta(=CH2)Me2]/[(≡SiO)2Ta(=CH2)Me] generated from well-defined surface organometallic complex [(≡SiO)TaVMe4]. / Chen, Yin; Abou-Hamad, Edy; Hamieh, Ali Imad Ali et al.
In: Journal of the American Chemical Society, Vol. 137, No. 2, 05.01.2015, p. 588-591.

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

TY - JOUR

T1 - Alkane metathesis with the tantalum methylidene [(≡SiO)Ta(=CH2)Me2]/[(≡SiO)2Ta(=CH2)Me] generated from well-defined surface organometallic complex [(≡SiO)TaVMe4]

AU - Chen, Yin

AU - Abou-Hamad, Edy

AU - Hamieh, Ali Imad Ali

AU - Hamzaoui, Bilel

AU - Emsley, Lyndon

AU - Basset, Jean-Marie

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: We thank KAUST for the generous financial support. This paper is dedicated to Yves Chauvin.

PY - 2015/1/5

Y1 - 2015/1/5

N2 - By grafting TaMe5 on Aerosil700, a stable, well-defined, silica-supported tetramethyl tantalum(V) complex, [(≡SiO)TaMe4], is obtained on the silica surface. After thermal treatment at 150 °C, the complex is transformed into two surface tantalum methylidenes, [(≡SiO)2Ta(=CH2)Me] and [(≡SiO)Ta(=CH2)Me2], which are active in alkane metathesis and comparable to the previously reported [(≡SiO)2TaHx]. Here we present the first experimental study to isolate and identify a surface tantalum carbene as the intermediate in alkane metathesis. A systematic experimental study reveals a new reasonable pathway for this reaction.

AB - By grafting TaMe5 on Aerosil700, a stable, well-defined, silica-supported tetramethyl tantalum(V) complex, [(≡SiO)TaMe4], is obtained on the silica surface. After thermal treatment at 150 °C, the complex is transformed into two surface tantalum methylidenes, [(≡SiO)2Ta(=CH2)Me] and [(≡SiO)Ta(=CH2)Me2], which are active in alkane metathesis and comparable to the previously reported [(≡SiO)2TaHx]. Here we present the first experimental study to isolate and identify a surface tantalum carbene as the intermediate in alkane metathesis. A systematic experimental study reveals a new reasonable pathway for this reaction.

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JF - Journal of the American Chemical Society

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Alkane metathesis with the tantalum methylidene [(≡SiO)Ta(=CH2)Me2]/[(≡SiO)2Ta(=CH2)Me] generated from well-defined surface organometallic complex [(≡SiO)TaVMe4]

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