-O) 5. These species have also been evaluated as catalysts for the polymerization of ethylene and copolymerization of ethylene/octene. These species were found to be single-site catalysts even under rather demanding conditions (50−160 °C, 100−300 psig ethylene), although the activities are generally low. Compound 5 affords polymer similar to that produced by 3, suggesting that MAO dehydrates 5 generating
的Li [NP的反应吨-Bu 3与的FeCl] 2得到[
氯3的Fe 2(μ-NP吨-Bu 3)2 ] 1以71%的产率。这种混合价的Fe(III)-Fe(II)经受可逆单电子氧化以生成[
氯3的Fe 2(μ-NP吨-Bu 3)2 ] +。
化学氧化用的[Cp 2的Fe] PF 6的产率[
氯2的Fe(μ-NP吨-Bu 3)] 2 2。Li [NP的反应吨-Bu 3 ]与FeBr 3次,得到[BR 4的Fe 2(μ-NP吨-Bu 3)2 ] 3,而的FeCl的反应3与我3 SiNPCy 3给出[
氯2的Fe(μ-NPCY 3)] 2 4。3的
水解产生了[[ t- Bu 3
PNH)Br 2 Fe] 2(μ-O)5物质。还已经评估了这些物质作为
乙烯聚合和
乙烯/
辛烯共聚的催化剂。尽管活性通常较低,但即使在相当苛刻的条件下(50-160°C,100-300 psig
乙烯),也发现这些物种是单中心催化剂。化