Abstract
Thermal treatment of three monobridged biscyclopentadienes (C5H5)R(C5H5) [R = C(CH3)2 (1), C(CH2)5 (2), Si(CH3)2 (3)] with Re2(CO)10 in refluxing mesitylene gave the corresponding complexes [(η 5-C5H4)2R][Re(CO)3]2 [R = C(CH3)2 (4), C(C5H10) (5), Si(CH3)2 (6)], which were separated by chromatography, and characterized by elemental analysis, IR, and 1H NMR spectroscopy. The molecular structures of complexes 5 and 6 were characterized by X-ray crystal diffraction analysis and show that both are monobridged bis(cyclopentadienyl)rhenium carbonyl complexes in which the molecule consists of two [(η 5-C5H4)Re(CO)3] moieties linked by a single bridge, in which each of the two Re(CO)3 units is coordinated to the cyclopentadienyl ring in an η 5 mode. All three of these monobridged bis(cyclopentadienyl)rhenium carbonyl complexes have good catalytic activities in Friedel–Crafts alkylation reactions.
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Acknowledgments
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 21372061), the Hebei Natural Science Foundation of China (Nos. B2013205025, B2014205018 and B2015205116), and the Key Research Fund of Hebei Normal University (No. L2012Z02).
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Li, Z., Ma, ZH., Wang, H. et al. Synthesis and catalytic activity of monobridged bis(cyclopentadienyl)rhenium carbonyl complexes. Transit Met Chem 41, 647–653 (2016). https://doi.org/10.1007/s11243-016-0064-1
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DOI: https://doi.org/10.1007/s11243-016-0064-1