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Cis-Specific Chain Transfer Ring-Opening Metathesis Polymerization Using a Vanadium(V) Alkylidene Catalyst for Efficient Synthesis of End-Functionalized Polymers
Organometallics ( IF 2.5 ) Pub Date : 2017-10-24 00:00:00 , DOI: 10.1021/acs.organomet.7b00675
Kotohiro Nomura 1 , Xiaohua Hou 1
Affiliation  

Highly efficient synthesis of end-functionalized polymers has been achieved by combined cis-specific ring-opening metathesis polymerization (ROMP) of norbornene with terminal olefins (1-hexene, allyltrimethylsilane (ATMS), etc.) as the chain transfer (cross metathesis) agent at 80 °C in the presence of V(CHSiMe3)(N-2,6-Cl2C6H3)[OC(CF3)3](PMe3)2. The ROMP proceeds with high activity and high cis selectivity (97–98%) upon addition of PMe3, and the Mn values could be controlled by varying the concentration of terminal olefins; the activity at 80 °C was not affected by the ATMS concentrations (5.0–50.0 mol %, TOF 1860–1890 min–1 ((1.12–1.13) × 105 h–1)).

中文翻译:

使用钒(V)炔烃催化剂进行顺式特定的链转移开环复分解聚合,可有效合成末端官能化的聚合物

通过降冰片烯与末端烯烃(1-己烯,烯丙基三甲基硅烷(ATMS)等)的顺式-开环易位聚合(ROMP)作为链转移(交叉复分解)的结合,已经实现了末端官能化聚合物的高效合成。V(CHSiMe 3)(N-2,6-Cl 2 C 6 H 3)[OC(CF 33 ](PMe 32的存在下,在80°C时反应。加入PMe 3M n后,ROMP仍具有较高的活性和较高的顺式选择性(97-98%)。可以通过改变末端烯烃的浓度来控制数值;ATMS浓度(5.0–50.0 mol%,TOF 1860–1890 min –1((1.12–1.13)×10 5 h –1))不影响80°C下的活性。
更新日期:2017-10-25
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