Formation and Decomposition of Distonic o-, m-, and p-Benzyne Radical Cations from Photolysis of Mg+(o-, m-, p-C6H4F2)

Formation and Decomposition of Distonic o-, m-, and p-Benzyne Radical Cations from Photolysis of Mg+(o-, m-, p-C6H4F2)

Distonic o-, m-, and p-benzyne radical cations (1−3) have been generated by a novel photolysis reaction of mass-selected Mg+−difluorobenzene complexes. The energy required for the formation of these radical cations is within 2.2 eV. The formation of o-benzyne cation is most facile. The benzyne radic...

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Veröffentlicht in:Journal of the American Chemical Society 2002-04, Vol.124 (14), p.3794-3798
Hauptverfasser: Liu, Hai-Chuan, Wang, Chang-Sheng, Guo, Wenyue, Wu, Yun-Dong, Yang, Shihe
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Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
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container_issue 14
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container_title Journal of the American Chemical Society
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creator Liu, Hai-Chuan
Wang, Chang-Sheng
Guo, Wenyue
Wu, Yun-Dong
Yang, Shihe
description Distonic o-, m-, and p-benzyne radical cations (1−3) have been generated by a novel photolysis reaction of mass-selected Mg+−difluorobenzene complexes. The energy required for the formation of these radical cations is within 2.2 eV. The formation of o-benzyne cation is most facile. The benzyne radical cations dissociate further to yield ethyne and 1,3-butadiyne radical cation as major products given a sufficient amount of energy. The whole process involves only a single photon, and is very efficient. The calculated threshold for the formation of 1,3-butadiyne radical cation from Mg+(o-C6H4F2) is about 4.6 eV, quite comparable with the experimental estimate.
doi_str_mv 10.1021/ja0122546
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subjects Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
title Formation and Decomposition of Distonic o-, m-, and p-Benzyne Radical Cations from Photolysis of Mg+(o-, m-, p-C6H4F2)
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