Ni-P系乙烯齐聚催化剂活性物的探讨

Study on Active Species of Ni P System Catalyst for Ethylene Oligomerization

研究了１，５－环辛二烯配位的Ｐ—Ｏ—Ｎｉ型螯合物（η３－Ｃ８Ｈ１３）Ｎｉ（Ｐｈ２ＰＣＨ２ＣＯＯ）（Ａ）和（η３－Ｃ８Ｈ１３）Ｎｉ（ｏ－Ｐｈ２ＰＣ６Ｈ４ＣＯＯ）（Ｂ）的合成与表征。用这种螯合物作单一的催化剂母体可进行乙烯齐聚反应，测试了反应前后螯合物Ａ的结构，同时与以ＮｉＣｌ２、Ｐｈ２ＰＣＨ２ＣＯＯＮａ或Ｐｈ２ＰＣ６Ｈ４ＣＯＯＮａ和ＮａＢＨ４为原料原位制备的催化剂的活性进行了比较。

A series of P O Ni chelate compounds (η 3 C 8H 13 )Ni(Ph 2PCH 2COO)(A) and (η 3 C 8H 13 )Ni( o Ph 2PC 6H 4COO)(B) are synthesized These two chelate compounds may be used as singular component catalysts for the oligomerization of ethylene The catalytic performance of the chelate catalysts are compared with those of the three membered catalyst systems NiCl 2 NaBH Ph 2CH 2COONa or Ph 2PC 6H 4COONa,which are prepared in situ The IR and 31 P NMR spectra of the chelate compounds are measured The experimental results showed that the carboxy group of the P O ligand formed a chelate ring with the center metal nickel ( Ni P O )during ethylene oligomerization