Synthesis and characterization of bi(metallacycloprop-1-ene) complexes |
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| Authors: | Wei Bai Long Yiu Tsang Yilun Wang Yang Li Herman H. Y. Sung Ian D. Williams Guochen Jia |
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| Affiliation: | Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon Hong Kong P. R. China.; State Key Laboratory of Fine Chemicals, Department of Chemistry, School of Chemical Engineering, Dalian University of Technology, Liaoning 116024 P. R. China.; School of Chemical Engineering, Dalian University of Technology, Panjin Liaoning 124221 P. R. China |
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| Abstract: | In all previously reported metallacycloprop-1-ene or η2-vinyl complexes, the metal center bears only one vinyl moiety. We have now successfully synthesized and structurally characterized the first complexes bearing two η2-vinyl moieties or spiro bi(metallacycloprop-1-ene) complexes from reactions of alkynes with rhenium phosphine complexes. Computational studies indicate that the metallacycloprop-1-ene rings are aromatic and the complexes represent a rare σ-type spirometalla-aromatic system.Well-defined metallacycloprop-1-ene complexes have only previously been isolated with a metal center bearing one vinyl moiety. We have successfully obtained the first examples of structurally characterized spiro bi(metallacycloprop-1-ene) complexes. |
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