Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis

Raju Dey; Manoja Samantaray; Albert Poater; Ali Imad Ali Hamieh; Santosh Giridhar Kavitake; Edy Abou-Hamad; Emmanuel Callens; Abdul-Hamid M. Emwas; Luigi Cavallo; Jean-Marie Basset

doi:10.1039/c6cc05352a

Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis

Raju Dey, Manoja Samantaray, Albert Poater, Ali Imad Ali Hamieh, Santosh Giridhar Kavitake, Edy Abou-Hamad, Emmanuel Callens, Abdul-Hamid M. Emwas, Luigi Cavallo, Jean-Marie Basset

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Abstract

A method for the synthesis of a homogeneous cationic tungsten(VI)penta-methyl complex [(WMe5)(+)(C6F5)(3)BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [( Si-O-)WMe4+ (C6F5)(3)BMe-] from a neutral silica supported tungstenpentamethyl complex [( Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)(3) reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)(+)(C6F5)(3)BMe-] shows moderate activity whereas the supported cationic complex [( Si-O-)WMe4+(C6F5)(3)BMe-] exhibits good activity in olefin metathesis reactions.

Original language	English (US)
Pages (from-to)	11270-11273
Number of pages	4
Journal	Chem. Commun.
Volume	52
Issue number	75
DOIs	https://doi.org/10.1039/c6cc05352a
State	Published - 2016

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Dey, R., Samantaray, M., Poater, A., Hamieh, A. I. A., Kavitake, S. G., Abou-Hamad, E., Callens, E., Emwas, A.-H. M., Cavallo, L., & Basset, J.-M. (2016). Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis. Chem. Commun., 52(75), 11270-11273. https://doi.org/10.1039/c6cc05352a

@article{ed4ca505098f49d884b0e96ac5e09d71,

title = "Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis",

abstract = "A method for the synthesis of a homogeneous cationic tungsten(VI)penta-methyl complex [(WMe5)(+)(C6F5)(3)BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [( Si-O-)WMe4+ (C6F5)(3)BMe-] from a neutral silica supported tungstenpentamethyl complex [( Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)(3) reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)(+)(C6F5)(3)BMe-] shows moderate activity whereas the supported cationic complex [( Si-O-)WMe4+(C6F5)(3)BMe-] exhibits good activity in olefin metathesis reactions.",

author = "Raju Dey and Manoja Samantaray and Albert Poater and Hamieh, {Ali Imad Ali} and Kavitake, {Santosh Giridhar} and Edy Abou-Hamad and Emmanuel Callens and Emwas, {Abdul-Hamid M.} and Luigi Cavallo and Jean-Marie Basset",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by funds from the King Abdullah University of Science and Technology (KAUST) office of sponsored research (OSR). A. P. thanks the Spanish MINECO for the project CTQ2014-59832-JIN. The authors also thank Dr Nassima Riache for fruitful discussions.",

year = "2016",

doi = "10.1039/c6cc05352a",

language = "English (US)",

volume = "52",

pages = "11270--11273",

journal = "Chem. Commun.",

issn = "1359-7345",

publisher = "Royal Society of Chemistry",

number = "75",

}

TY - JOUR

T1 - Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis

AU - Dey, Raju

AU - Samantaray, Manoja

AU - Poater, Albert

AU - Hamieh, Ali Imad Ali

AU - Kavitake, Santosh Giridhar

AU - Abou-Hamad, Edy

AU - Callens, Emmanuel

AU - Emwas, Abdul-Hamid M.

AU - Cavallo, Luigi

AU - Basset, Jean-Marie

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported by funds from the King Abdullah University of Science and Technology (KAUST) office of sponsored research (OSR). A. P. thanks the Spanish MINECO for the project CTQ2014-59832-JIN. The authors also thank Dr Nassima Riache for fruitful discussions.

PY - 2016

Y1 - 2016

N2 - A method for the synthesis of a homogeneous cationic tungsten(VI)penta-methyl complex [(WMe5)(+)(C6F5)(3)BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [( Si-O-)WMe4+ (C6F5)(3)BMe-] from a neutral silica supported tungstenpentamethyl complex [( Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)(3) reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)(+)(C6F5)(3)BMe-] shows moderate activity whereas the supported cationic complex [( Si-O-)WMe4+(C6F5)(3)BMe-] exhibits good activity in olefin metathesis reactions.

AB - A method for the synthesis of a homogeneous cationic tungsten(VI)penta-methyl complex [(WMe5)(+)(C6F5)(3)BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [( Si-O-)WMe4+ (C6F5)(3)BMe-] from a neutral silica supported tungstenpentamethyl complex [( Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)(3) reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)(+)(C6F5)(3)BMe-] shows moderate activity whereas the supported cationic complex [( Si-O-)WMe4+(C6F5)(3)BMe-] exhibits good activity in olefin metathesis reactions.

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U2 - 10.1039/c6cc05352a

DO - 10.1039/c6cc05352a

M3 - Article

C2 - 27709169

SN - 1359-7345

VL - 52

SP - 11270

EP - 11273

JO - Chem. Commun.

JF - Chem. Commun.

IS - 75

ER -

Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis

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