Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/79236

Preparation of Osmium η3-Allenylcarbene Complexes and Their Uses for the Syntheses of Osmabenzyne Complexes

Authors Wen, Ting Bin HKUST affiliated (currently or previously)
Lee, Ka Ho HKUST affiliated (currently or previously)
Chen, Jiangxi HKUST affiliated (currently or previously)
Hung, Wai Yiu HKUST affiliated (currently or previously).
Bai, Wei HKUST affiliated (currently or previously)
Li, Huacheng HKUST affiliated (currently or previously).
Sung, Ho Yung 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 2016
Source Organometallics , 35, 10, March 2016, p. 1514-1525
Summary Treatment of OsCl2(PPh3)3 with HC≡CAr (Ar = Ph, p-tolyl) produced the η3-allenylcarbene complexes OsCl2(═CAr-η2-CH═C═CHAr)(PPh3)2. Reactions of the η3-allenylcarbene complexes with gold alkynyls Au(C≡CR)(PPh3) (R = Ph, p-tolyl, TMS, nBu, CH(OEt)2) or copper(I) alkynyls Cu(C≡CR) (R = Ph, TMS) in the presence of HNEt3Cl produced the osmabenzynes Os{≡CC(R)═C(CH2Ar)CH═CAr}Cl2(PPh3)2. Computational studies suggest that the osmabenzynes are formed through electrocyclization of osmium alkynyl-allenylcarbene intermediates followed by protonation with HNEt3Cl.
ISSN 0276-7333
Language English
Format Article
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