当前位置: X-MOL 学术Polymer › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
2-Phosphine-pyridine-N-oxide palladium and nickel catalysts for ethylene polymerization and copolymerization with polar monomers
Polymer ( IF 4.1 ) Pub Date : 2020-03-24 , DOI: 10.1016/j.polymer.2020.122410
Yixin Zhang , Zhongbao Jian

A new family of [P,O] late transition metal catalysts, namely 2-phosphine-pyridine-N-oxide palladium complexes Pd1Pd4 {[κ2(P,O)-2-Ar2P-6-R-(C5H3NO)]PdMeCl} (Pd1: Ar = Ph, R = H; Pd2: Ar = 2-MeO-C6H4, R = H; Pd3: Ar = Ph, R = tBu; Pd4: Ar = 2-MeO-C6H4, R = tBu) and nickel complexes Ni1Ni4 {[κ2(P,O)-2-Ar2P-6-R-(C5H3NO)]Ni(allyl)}[BArF] (Ni1: Ar = Ph, R = H; Ni2: Ar = 2-MeO-C6H4, R = H; Ni3: Ar = Ph, R = tBu; Ni4: Ar = 2-MeO-C6H4, R = tBu) and Ni5 {[κ2(P,O)-2-Ph2P-6-tBu-(C5H3NO)]2Ni(allyl)}[BArF], was synthesized and comprehensively characterized by NMR spectroscopy, single-crystal X-ray diffraction, and elemental analysis. These new [P,O] palladium and nickel catalysts were evaluated for the (co)polymerization of ethylene. Among the synthesized catalysts, palladium catalysts Pd2 and Pd4 oligomerized ethylene with high activities of 106 g mol−1 h−1, while the nickel counterparts could polymerize ethylene in higher activities and higher polymer molecular weights, among which Ni4 preferred to afford polyethylene with the highest molecular weight. Moreover, Ni4 could catalyze the copolymerization of ethylene and biorenewable polar comonomer methyl 10-undecenoate, with the activity up to 105 g mol−1 h−1 and the incorporation of 0.4–1.2 mol%.



中文翻译:

2-膦-吡啶-N-氧化物钯和镍催化剂,用于乙烯聚合和与极性单体共聚

[P,O]后过渡金属催化剂,即2-膦-吡啶的新家族Ñ氧化物钯络合物PD1PD4 {[κ 2P,O)-2-氩2 P -6-R-( ç 5 ħ 3 ñ ö)] PdMeCl}(PD1:氩=苯基,R = H;加入Pd 2:Ar为2-的MeO-C 6 H ^ 4,R = H;器Pd3:Ar为PH,R = 卜; PD4:Ar为2-的MeO-C 6 H ^ 4,R = 丁基)和镍络合物NI1NI4{[κ 2P,O)-2-氩2 P -6-R-(C 5 H ^ 3 Ñ ö)]的Ni(烯丙基)} [BARF](NI1:氩=苯基,R = H; NI2:的Ar = 2-的MeO-C 6 H ^ 4,R = H;的Ni3:AR =苯基,R = 卜; NI4:AR = 2-的MeO-C 6 H ^ 4,R = 丁基)和NI5 {[κ 2P,O)-2-Ph 2 P -6- t Bu-(C 5 H 3 N O)]合成了2 Ni(烯丙基)} [BArF],并通过NMR光谱,单晶X射线衍射和元素分析对其进行了全面表征。对这些新的[P,O]钯和镍催化剂进行了乙烯的(共)聚合反应评估。在合成的催化剂中,钯催化剂Pd2Pd4低聚乙烯,具有10 6  g mol -1 h -1的高活性,而镍对应物可以使乙烯以更高的活性和更高的分子量聚合,其中Ni4优先提供聚乙烯以最高分子量。此外,Ni4可以催化乙烯和生物可再生极性共聚单体10-十一碳烯酸甲酯的共聚,其活性高达10 5  g mol -1 h -1,掺入量为0.4-1.2 mol%。

更新日期:2020-03-26
down
wechat
bug