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近年来探索有效的给电子体,以提高聚丙烯催化剂的活性及定向能力,是相当活跃的研究领域,国内外在这方面进行了大量的研究。对于高效的第二代聚丙烯催化剂,给电子体的作用显得尤为重要。酯类是一种较好的给电子体。虽然对TiCl_4和酯络合物的研究早在Ziegler-Natta催化剂问世前就有所报道,但其晶体结构只在不久前才有个别测定。而直接有工业意义的TiCL_4和PhCOOEt络合物的晶体结构至今尚未测定。为此我们制得两种络合物TiCl_4·L及TiCl_4·2L(L=PhCOOEt),并测定了它们的晶体结构。
In recent years to explore the effective electron donor to improve the activity and orientation of polypropylene catalyst is a very active field of research at home and abroad in this area a lot of research. The role of electron donors is particularly important for efficient second generation polypropylene catalysts. Esters are a good electron donor. Although studies on TiCl4 and ester complexes were reported long before the advent of the Ziegler-Natta catalyst, their crystal structure has been measured only recently. The crystal structure of the directly industrialized TiCL_4 and PhCOOEt complexes has not been determined. To this end, we prepared two complexes TiCl 4 · L and TiCl 4 · 2L (L = PhCOOEt), and measured their crystal structure.