sulfoxide derivatives. The monocationic complexes are tested as precatalysts for the ethylene/methyl acrylate cooligomerization under mild reaction conditions of temperature and ethylene pressure. The catalytic product is a mixture of ethylene/acrylate cooligomers and higher alkenes. The catalysts containing the new nonsymmetric ligand are found to be more productive than those with the symmetric Ar‐BIANs
报道了一种新的非对称双(芳基-亚
氨基)ph(Ar-BIAN)
配体,其特征是N-供体原子的空间和电子微妙的不平衡。随着新的
配体和相应的对称取代的衍
生物,中性和单阳离子的Pd CH 3化合物已被合成和表征。单阳离子络合物系列[Pd(CH 3)(L)(Ar-BIAN)] [PF 6 ](L = CH 3CN,dmso)已扩展为
二甲基亚砜衍
生物。在温度和
乙烯压力的温和反应条件下,将单阳离子络合物作为
乙烯/
丙烯酸甲酯冷聚的预催化剂进行了测试。催化产物是
乙烯/
丙烯酸酯低聚物和高级烯烃的混合物。发现含有新型非对称
配体的催化剂比具有对称Ar-BIANs的催化剂生产率更高。与Pd-NCCH 3同类催化剂相比,Pd-dmso催化剂生产率更高,寿命更长。