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本文用磁化率法研究了以Al(i-Bu)_2H为助催化剂的镍系各组分间的相互作用。结果表明,Al(i-Bu)_2H的还原能力较Al(i-Bu)_3弱;在Ni(naph)_2-BF_3·OEt_2-Al(i-Bu)_2H体系中不存在铁磁性;Bd和BF_3·OEt_2均有促进Ni(Ⅱ)还原的作用;反应时伴有氢气放出;Ni-AlH-B与Ni-Al-B两体系催化丁二烯聚合活性十分相近。
In this paper, the interaction between various nickel components with Al (i-Bu) _2H as cocatalyst has been investigated by means of magnetic susceptibility. The results show that the reduction ability of Al (i-Bu) _2H is weaker than that of Al (i-Bu) _3; there is no ferromagnetism in Ni (naph) _2-BF_3 · OEt_2-Al BF_3 · OEt_2 promoted the reduction of Ni (Ⅱ); hydrogen was released during the reaction; but the polymerization activities of butadiene by Ni-AlH-B and Ni-Al-B systems were very similar.