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Reaction of [η 5:σ-Me2C(C5H4)(C2B10H10)]Ru(NCCH3)2 with internal alkynes: Synthesis and structural characterization of ruthenium-cyclobutadiene and ruthenacyclopentatriene complexes

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Abstract

Reaction of [η 5:σ-Me2C(C5H4)(C2B10H10)]Ru(NCCH3)2 (1) with R1C≡CR1(R1 = Et, Ph) in toluene at 80°C yielded organoruthenium cyclobutadiene complexes [η 5:σ-Me2C(C5H4)(C2B10H10)]Ru(η 4-C4R 14 ) in >80% yield. Treatment of 1 with diynes R2C≡C(CH2)3C≡CR2 (R2 = Me, Et) in toluene at room temperature yielded ruthenacyclopentatrienes [η 5:σ-Me2C (C5H4)(C2B10H10)]Ru[=C2(R2)2C2(CH2)3] in >85% yield. These new complexes were fully characterized by various spectroscopic techniques, elemental analyses and single-crystal X-ray diffraction studies. The possible reaction mechanism was proposed.

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  1. Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China

    ZaoZao Qiu, Yi Sun & ZuoWei Xie

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  1. ZaoZao Qiu
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  2. Yi Sun
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Qiu, Z., Sun, Y. & Xie, Z. Reaction of [η 5:σ-Me2C(C5H4)(C2B10H10)]Ru(NCCH3)2 with internal alkynes: Synthesis and structural characterization of ruthenium-cyclobutadiene and ruthenacyclopentatriene complexes. Sci. China Chem. 53, 2123–2128 (2010). https://doi.org/10.1007/s11426-010-4111-z

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