Catalytic activity of cationic diphospalladium(II) complexes in the alkene/CO copolymerization in organic solvents and water in dependence on the length of the alkyl chain at the phosphine ligands
作者:Ekkehard Lindner、Markus Schmid、Joachim Wald、Joachim A. Queisser、Michael Geprägs、Peter Wegner、Christiane Nachtigal
DOI:10.1016/s0022-328x(00)00154-6
日期:2000.5
analysis. In particular the water-soluble complexes 2c–k proved to be highly active in the carbon monoxide/ethene copolymerization under biphasic conditions (water–toluene). In the presence of an emulsifier and methanol as activator the catalytic activity increased by a factor of about three. Also higher olefins could be successfully incorporated into the copolymerization with CO and the terpolymerization
一系列双膦配体CH 2(CH 2 PR 2)2(1a – x)(a – g:R =(CH 2)n OH,n = 1,3-8; h – k:R =(CH 2)n CH(CH 2 OH)2,n = 3–6;l – u:R = C n H 2 n +1,n = 1–8,10,14; v – x:R = CH(CH 3通过相应的1-烯烃的加氢磷酸化反应制备具有不同极性官能团的)2,(CH 2)2 CH(CH 3)2,(CH 2)3 CH(CH 3)2(方案1)。 H 2 P(CH 2)3 PH 2或格氏试剂与Cl 2 P(CH 2)3 PCl 2的反应。水溶性钯络合物[(R 2 P(CH 2)3 PR 2)Pd(OAc)2 ](2a - k)是通过Pd(OAc)2与配体1a - k在乙醇-乙腈中的反应获得的。用1l – x处理PdCl 2(NCC 6 H 5)2得到二氯钯(II)络合物[(R 2 P(CH