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Citation: Pang Shufen, Xie Demin, Sun Tao, Ji Xianzhong, Shan Chengji, Yang Jihua. PRELIMINARY STUDY ON THE REACTION PROCESS OF A HOMOGENEOUS RARE EARTH CATALYST[J]. Chinese Journal of Applied Chemistry, ;1990, 7(3): 85-88. shu

PRELIMINARY STUDY ON THE REACTION PROCESS OF A HOMOGENEOUS RARE EARTH CATALYST

1.
Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Received Date: 25 July 1989
Available Online: 21 November 1989
Fund Project:

A homogeneous rare earth catalyst comprising neodymium octonate, diisobutylaluminum hydride and dichlorodiphenylsilane[Nd(Oct)₃-HAl(i-Bu)²-φ₂SiCl₂] for stereospecific polymeri-zation of butadiene was selected to study the action of the third component in the homoge-neous system. Investigation on reactions between Nd(oct)₃, HAl(i-Bu)₂ and φ₂SiCl₂ by means of NMR(¹H and ¹³C spectra) showed that the φ₂SiCl₂,unlike alkyl aluminum chloride,does not react directly with Nd-salt, suepplying the chlorine atom, it reacts first with HAl(i-Bu)₂, giving φ₂SiH₂ and Al(i-Bu)₂Cl, and the latter affords the Nd-salt chlorine atom necessary for forming an active catalyst.Some experimental facts found in polymeriza-tion of butadiene using the catalyst were explained by the reaction path mentioned above.
- rare earth catalyst,
- butadiene polymerization,
- homogeneous reaction
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