X)}NiBr2/MAO is used as catalyst. The influence of the catalyst structure, pressure, and temperature on the polymerization activity, molar mass, glass transition temperature, melting temperature and branching of the polymers has been studied. The dialkyl complex DAD(H,H)}Ni(CH2SiMe3)2 underwent rapid reductive carbonylation giving the dicarbonyl complex DAD(H,H)}Ni(CO)2 along with both bis(trimethylsilyl)ethane
热敏二烷基
镍络合物
DAD(H,H)} Ni(CH 2 SiMe 3)2和
DAD(Me,Me)} Ni(CH 2 SiMe 3)2 [
DAD(X,X)= 2,6-合成了i Pr 2 C 6 H 4 –N)C(X)–C(X)6N–C 6 H 4 i Pr 2 -2,6],并通过单晶的X射线衍射研究对其进行了表征。α主链上的取代基X-二
亚胺配体显着影响2,6-
二异丙基苯基取代基的构象。当使用
DAD(X,X)} NiBr 2 / MAO作为催化剂时,认为该作用对于
乙烯的聚合至关重要。研究了催化剂结构,压力和温度对聚合活性,摩尔质量,
玻璃化转变温度,熔融温度和聚合物支化度的影响。对二烷基络合物
DAD(H,H)} Ni(CH 2 SiMe 3)2进行快速还原羰基化,得到二羰基络合物
DAD(H,H)} Ni(CO)2以及双(三甲基甲
硅烷基)
乙烷和α,α'-双(三甲基甲
硅烷基)
丙酮。通过X射线晶体学表征二羰基
DAD(H,H)}