Single-molecule resolution of an organometallic intermediate in a surface-supported Ullmann coupling reactionJournal of the American Chemical Society (2011)
We have studied the organometallic intermediate of a surface-supported Ullmann coupling reaction from 4, 4”-dibromo-p-terphenyl to poly(para-phenylene) by scanning tunneling microscopy/spectroscopy and density functional theory calculations. Our study reveals at a single-molecular level that the intermediate consists of biradical (ph)3 units that are connected by single Cu atoms through C-Cu-C bridges. Upon further increasing the temperature, the neighboring biradical (ph)3 units are coupled by C-C bonds forming poly(para-phenylene) oligomers while the Cu atoms are released.
Citation InformationWeihua Wang, Xingqiang Shi, Shiyong Wang, Michel A. Van Hove, et al.. "Single-molecule resolution of an organometallic intermediate in a surface-supported Ullmann coupling reaction" Journal of the American Chemical Society Vol. 133 Iss. 34 (2011) p. 13264 - 13267 ISSN: 1520-5126
Available at: http://works.bepress.com/mavanhove/102/