摘要
醚类会被广泛用来改性Ziegler-Natta催化剂,如著名的Solvay型催化剂就是用异戊醚处理β-TiCl,国内研制的所谓络合Ⅰ型,或络合Ⅱ型催化剂则是用异戊醚或正丁醚作为络合剂。乙醚与四氯化钛的反应物对3TiCl·AlCl催化剂有显著的改进,给电子体醚可使铝在催化剂表面富集。因而研究醚与四氯化钛或三氯化钛络合物的结构是一个基本的问题。已知四氯化钛和醚可生成多种络合物,但其分子结构及晶体结构测定甚少,本实验测定了四价钦醚络合物的分子结构和晶体结构, 还得到了该络合物的粉末图和红外光谱。
The crystal and molecular structure of titanium ether complex has been determined by X-ray diffraction. TiCland EtO can form 1: 2 complex, TiCl·2EtO, which is in cis-configuration. The crystal belongs to monoclinic space group C~5P21/n with unit cell parameters: a=8.877(4) A, b=13.115(8)A, c=13.437(8)A, β=98.27(5)°, Z=4. The structure was refined to R=0.108、R=0.127 for 1002 reflections. It has been showed that the titanium ether complex which has been used to modify the catalyst (3TICl·AlCl) is TiCl·2EtO. The powder pattern and infrared spectra of the complex have also been got. Some bases for characterizing the catalyst have provided.
出处
《物理化学学报》
SCIE
CAS
1986年第3期278-283,共6页
Acta Physico-Chimica Sinica
