A new family of [P,O] late transition metal catalysts, namely 2-phosphine-pyridine-N-oxide palladium complexes Pd1∼Pd4 {[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 Ni1∼Ni4 {[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%.

[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PD1〜PD4 {[κ ²（P，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 = ^吨卜; PD4：Ar为2-的MeO-C ₆ H ^ ₄，R = ^吨丁基）和镍络合物NI1〜NI4{[κ ²（P，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 = ^吨卜; NI4：AR = 2-的MeO-C ₆ H ^ ₄，R = ^吨丁基）和NI5 {[κ ²（P，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Pd2和Pd4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％。