| Well-defined phosphate yttrium dialkyl complexes for catalytic stereo-controllable 1,4-polymerization of isoprene |
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| 作者姓名： | Pusu Yang Hui-Zhen Du Xiang-Yu Zhang Yong-Liang Xia Jun-Tao Sun Qian Peng Bing-Tao Guan |
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| 作者单位： | 1. College of Chemistry, Nankai University;2. Department of Chemistry, Fudan University |
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| 基金项目： | supported by National Natural Science Foundation of China (Nos. 21890722 and 21950410519)；;National Natural Science Foundation of Tianjin (No. 19JCYBJC20100)； |
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| 摘 要： | Oxygen ligation is envisioned to provide a stable and distinctive coordination environment to the strongly oxophilic rare-earth metals. However, the well-defined dialkyl complexes bearing oxyanion ancillary ligand had been rarely addressed for the instability of the complexes and the shortage of easily available ligands. Herein, we report the synthesis of phosphate ligated dialkyl yttrium complexes（PYR2） featuring a high stability and a tunable ligand. Treated with the borate reagent, the phosph...
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| 收稿时间： | 23 July 2021 |
Well-defined phosphate yttrium dialkyl complexes for catalytic stereo-controllable 1,4-polymerization of isoprene |
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| Pusu Yang,Hui-Zhen Du,Xiang-Yu Zhang,Yong-Liang Xia,Jun-Tao Sun,Qian Peng,Bing-Tao Guan.Well-defined phosphate yttrium dialkyl complexes for catalytic stereo-controllable 1,4-polymerization of isoprene[J].Chinese Chemical Letters,2022,33(5):2402-2406. |
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| Institution: | 1. College of Chemistry, Nankai University, Tianjin 300071, China;2. Department of Chemistry, Fudan University, Shanghai 200438, China |
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| Abstract: | Oxygen ligation is envisioned to provide a stable and distinctive coordination environment to the strongly oxophilic rare-earth metals. However, the well-defined dialkyl complexes bearing oxyanion ancillary ligand had been rarely addressed for the instability of the complexes and the shortage of easily available ligands. Herein, we report the synthesis of phosphate ligated dialkyl yttrium complexes (PYR2) featuring a high stability and a tunable ligand. Treated with the borate reagent, the phosphate yttrium complex displays high activity and selectivity in the catalytic cis-1,4-polymerization of isoprene (up to 96.5%). Furthermore, using AlMe3 as an additive, the stereoselectivity switches to trans-1,4-polymerization (up to 92.0%). |
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