Allyl isomerization mediated by cyclopentadienyl ruthenium carbonyl compounds |
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| Authors: | Jin Lin Zhi-Hong Ma Fang Li Ming-Xia Zhao Xiao-Huan Liu Xue-Zhong Zheng |
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| Affiliation: | (1) The College of Chemistry and Material Science, Hebei Normal University, 050016 Shijiazhuang, People’s Republic of China;(2) College of Basic Medicine, Hebei Medical University, 050017 Shijiazhuang, People’s Republic of China |
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| Abstract: | Three new diruthenium complexes, namely (η 5-C5H4C(CH2)4CH=CHCH3)2Ru2(CO)2(μ-CO)2 (1), (η 5-C5H4CEt2CH=CHCH3)2Ru2(CO)2(μ-CO)2 (2), and (η 5-C5Me4CH=CHCH3)2Ru2(CO)2(μ-CO)2 (3), were synthesized and characterized by elemental analysis, IR and 1H-NMR spectra. The crystal structures of complexes 1 and 2 were determined by X-ray single-crystal diffraction and showed that the allyl reagents used in their synthesis underwent isomerization to give the corresponding methyl–vinyl complexes. The X-ray crystal structures of complexes 1 and 2 confirm the presence of both bridging and terminal CO groups. A possible mechanism for the observed alkene isomerizations is discussed. |
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