ESR studies catalyst systems iron compounds - Al(i-Bu)3 - halide

Abstract

The ESR spectra of 2 novel Fe catalyst systems Fe(naph)2-Al(iso-Bu)3-allyl chloride and Fe(acac)3-Al(iso-Bu)3-AlEt2Cl (naph = naphthenate) used for the polymerisation of butadiene were measured. The valence states of Fe in the active species are divalent for both systems. Thus, by using Fe(acac)3 as the main catalyst, reduction from Fe3+ to Fe2+ occurs during the formation of the active catalyst, and a free radical formed during reduction is detected. Reactions among the 3 components are discussed.

Key words: HALIDE, CATALYST, TERNARY SYSTEM, ALUMINIUM COMPOUNDS, IRON COMPOUNDS, ELECTRON SPIN RESONANCE, BUTANE P

CLC Number:

O657
O643

Cite this article

SHEN QI;GUO XIAOGUANG;ZHAN RUIYUAN;LIU GUOZHI. ESR studies catalyst systems iron compounds - Al(i-Bu)3 - halide[J]. Acta Chimica Sinica, 1987, 45(12): 1204-1206.

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铁化合物-Al(i-Bu)3卤化物系催化剂的ESR研究