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Reactions of Osmium Carbyne Complexes OsCl3( CR)(PPh3)(2) (R = CH=CPh2, CH2Ar) with Bromine and Hydrogen Peroxide

Authors Bai, Wei HKUST affiliated (currently or previously)
Lee, Ka-Ho HKUST affiliated (currently or previously)
Hung, Wai Yiu HKUST affiliated (currently or previously).
Sung, Herman H. Y. HKUST affiliated (currently or previously)
Williams, Ian D. View this author's profile
Lin, Zhenyang View this author's profile
Jia, Guochen View this author's profile
Issue Date 2017
Source Organometallics , v. 36, (3), February 2017, p. 657-664
Summary The reactions of the trichloro carbyne complexes OsCl3(-CR)(PPh3)(2) (R = CH=CPh2, CH2Ar) with bromine and hydrogen peroxide were studied. Unlike monochloro carbyne complexes OsCl3( CR)(PPh3)(2), do not undergo oxidation reactions at the metal center or the metal carbyne bond. Treatment of OsCl3( CCH=CPh2)(PPh3)(2) with Br-2/H2O and H2O2/HCl produced OsBr3( CCH=CPh2)(H2O)(PPh3) and OsCl3( CCCl=CPh2)(PPh3)(2), respectively. Reactions of OsCl3( CCH2-C6H4-p-R)(PPh3)(2), (R = H, CMe3) with H2O2/HCl or H2O2 gave OsCl3{ CC(O)-C6H4-p-R}(PPh3)(2). Computational studies suggest that the difference in the reactivity of OsCl(=CAr)(CO)(PPh3), and OsCl3( CR)(PPh3)(2) is mainly of thermodynamic origin.
ISSN 0276-7333
Language English
Format Article
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