Free radical addition to olefins. Part 11. - Telomerization of tetrafluoroethylene with dibromodifluoromethane and trifluoroiodomethane

David S. Ashton; John M. Tedder; John C. Walton

doi:10.1039/F19747000299

Free radical addition to olefins. Part 11. - Telomerization of tetrafluoroethylene with dibromodifluoromethane and trifluoroiodomethane

David S. Ashton, John M. Tedder, John C. Walton^*

^*Corresponding author for this work

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

Abstract

The telomerization of tetrafluoroethylene in the gas phase by CF ₂Br₂ results in the formation of products of general formula Br[CF₂]_nBr n = 2-11. When CF₃I was used the products were found to be CF₃[CF₂CF₂] _nI where n = 1 to 5. Transfer constants have been determined for radicals containing various numbers of tetrafluoroethylene units, and Arrhenius parameters from temperature variation data. Trends in the transfer constants are compared with previous work in solution. The activation energies from the transfer constants are combined with known values of the activation energies of the addition steps to give estimates of the activation energies of the halogen abstraction steps.

Original language	English
Pages (from-to)	299-307
Number of pages	9
Journal	Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
Volume	70
DOIs	https://doi.org/10.1039/F19747000299
Publication status	Published - 1 Dec 1974

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title = "Free radical addition to olefins. Part 11. - Telomerization of tetrafluoroethylene with dibromodifluoromethane and trifluoroiodomethane",

abstract = "The telomerization of tetrafluoroethylene in the gas phase by CF 2Br2 results in the formation of products of general formula Br[CF2]nBr n = 2-11. When CF3I was used the products were found to be CF3[CF2CF2] nI where n = 1 to 5. Transfer constants have been determined for radicals containing various numbers of tetrafluoroethylene units, and Arrhenius parameters from temperature variation data. Trends in the transfer constants are compared with previous work in solution. The activation energies from the transfer constants are combined with known values of the activation energies of the addition steps to give estimates of the activation energies of the halogen abstraction steps.",

author = "Ashton, {David S.} and Tedder, {John M.} and Walton, {John C.}",

year = "1974",

month = dec,

day = "1",

doi = "10.1039/F19747000299",

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volume = "70",

pages = "299--307",

journal = "Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases",

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Free radical addition to olefins. Part 11. - Telomerization of tetrafluoroethylene with dibromodifluoromethane and trifluoroiodomethane. / Ashton, David S.; Tedder, John M.; Walton, John C.
In: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, Vol. 70, 01.12.1974, p. 299-307.

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

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T1 - Free radical addition to olefins. Part 11. - Telomerization of tetrafluoroethylene with dibromodifluoromethane and trifluoroiodomethane

AU - Ashton, David S.

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AU - Walton, John C.

PY - 1974/12/1

Y1 - 1974/12/1

N2 - The telomerization of tetrafluoroethylene in the gas phase by CF 2Br2 results in the formation of products of general formula Br[CF2]nBr n = 2-11. When CF3I was used the products were found to be CF3[CF2CF2] nI where n = 1 to 5. Transfer constants have been determined for radicals containing various numbers of tetrafluoroethylene units, and Arrhenius parameters from temperature variation data. Trends in the transfer constants are compared with previous work in solution. The activation energies from the transfer constants are combined with known values of the activation energies of the addition steps to give estimates of the activation energies of the halogen abstraction steps.

AB - The telomerization of tetrafluoroethylene in the gas phase by CF 2Br2 results in the formation of products of general formula Br[CF2]nBr n = 2-11. When CF3I was used the products were found to be CF3[CF2CF2] nI where n = 1 to 5. Transfer constants have been determined for radicals containing various numbers of tetrafluoroethylene units, and Arrhenius parameters from temperature variation data. Trends in the transfer constants are compared with previous work in solution. The activation energies from the transfer constants are combined with known values of the activation energies of the addition steps to give estimates of the activation energies of the halogen abstraction steps.

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Free radical addition to olefins. Part 11. - Telomerization of tetrafluoroethylene with dibromodifluoromethane and trifluoroiodomethane

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