Synthesis and characterization of palladium(<scp>ii</scp>) complexes with new diphosphonium-diphosphine and diphosphine ligands. Production of low molecular weight alternating polyketones via catalytic CO/ethene copolymerisation
作者:Claudio Bianchini、Peter Brüggeller、Carmen Claver、Georg Czermak、Alexander Dumfort、Andrea Meli、Werner Oberhauser、Eduardo J. Garcia Suarez
DOI:10.1039/b601154c
日期:——
bis-cationic diphosphonium-diphosphine 6,7-di(di-2-methoxyphenyl)phosphinyl-2,2,4,4-tetra(di-2-methoxyphenyl)-2 lambda 4,4 lambda 4-diphosphoniumbicyclo[3.1.1]heptane-bis(PF6) ((o-MeO-PCP)(PF6)2) and the diphosphine rac-2,4-bis((di-2-methoxyphenyl)phosphino)pentane (rac-o-MeO-bdpp) have been synthesized. Both ligands have been employed to coordinate PdCl2 and Pd(OAc)2 to give [PdCl2(o-MeO-PCP)](PF6)2 (1a),
双阳离子二phosph-二膦6,7-二(二-2-甲氧基苯基)膦基-2,2,4,4-四(二-2-甲氧基苯基)-2 4,4,4 4- 4-二phosph双环[3.1。 1]庚烷-双(PF6)((o-MeO-PCP)(PF6)2)和二膦rac-2,4-双((di-2-甲氧基苯基)膦基)戊烷(rac-o-MeO-bdpp )已合成。两种配体均已用于配位PdCl2和Pd(OAc)2以得到[PdCl2(o-MeO-PCP)](PF6)2(1a),PdCl2(rac-o-MeO-bdpp)(1b),[Pd (OAc)2(o-MeO-PCP)] [PF6)2(2a)和Pd(OAc)2(rac-o-MeO-bdpp)(2b)。配体和配合物已在溶液中通过多核NMR光谱进行了全面表征。此外,1a和1b已通过单晶X射线结构分析进行了身份验证。Pd(II)配合物1a和1b已用作水/乙酸混合物中CO /乙烯共聚的催化