results provide strong evidence that the −CHF2 and −CH2F chain ends in E/VF copolymer generated by (phosphinoarenesulfonate)PdR catalysts form by β‐F elimination of Pd(β‐F‐alkyl) species, VF or E insertion of the resulting (PO)PdF species, and subsequent chain growth. These results also imply that β‐F elimination is not an important catalyst deactivation reaction in this system.
离散的(膦
芳烃磺酸盐)Pd
氟化物络合物(PO Bp,OMe)PdF(lutidine),其中PO Bp,OMe =(2-MeOC 6 H 4)(2-2,6-(MeO)2 C 6 H 3 } ç 6 ħ 4)(2-SO 3 -5-M
EC 6 ħ 3)P,插入
氟乙烯(VF),以形成(PO BP,OME)
PDCH 2 CHF 2(二
甲基吡啶)和插入多种
乙烯(E)单元生成包含-CH 2 F链端的聚
乙烯。这些结果提供了有力的证据,表明-CHF 2和-CH 2由(膦基
芳烃磺酸盐)PdR催化剂产生的E / VF共聚物中的F链末端是通过β-F消除Pd(β-F-烷基)物种,VF或E插入生成的(PO)PdF物种以及随后的链增长而形成的。这些结果还暗示,在该系统中,β-F的消除不是重要的催化剂失活反应。