论文部分内容阅读
在通常镍系Ni(naph)_2-Al(i-Bu)_3-BF_3OEt_2和改型镍体系Ni(naph)_2-Al(i-Bu)_2(OR)-BF_3OEt_2中,助催化剂的还原能力顺序为Al(i-Bu)_3>Al(i-Bu)_2(OPhC_8H_(17))>Al(i-Bu)_2(OPhCH_3)>Al(i-Bu)_2(OPh)>Al(i-Bu)_2(OC_8H_7)在Ni(naph)_2-Al(i-Ba)_2(OC_8H_(17))-BF_3OEt_2体系中镍以Ni(Ⅰ)存在为主,其它体系中均Ni(0)和Ni(Ⅰ)共存为特点。Bd的预混能促进各体系中Ni(Ⅱ)→Ni(Ⅰ)的反应。在Ni(naph)_2-Bd-Al(i-Bu)_2(OPh)和Ni(naph)_2-Bd-Al(i-Bu)_2(OPhCH_3)体系中有Ni(0)聚集体,显铁磁性,而其它体系均显顺磁性。
In the usual nickel series of Ni (naph) _2-Al (i-Bu) _3-BF_3OEt_2 and nickel (naph) _2-Al (i-Bu) _2 (OR) -BF_3OEt_2, the order of reducibility (I-Bu) _2 (OPh)> Al (i-Bu) _3> Al (i-Bu) _2 (OPhC_8H_17)> Al Ni2 + and Ni2 + in the system of Ni (naph) _2-Al (i-Ba) _2 (OC_8H_ (17)) - BF_3OEt_2 are mainly Ni (Ⅰ) Ⅰ) coexistence as a feature. Pre-mixing of Bd can promote the reaction of Ni (Ⅱ) → Ni (Ⅰ) in various systems. There are Ni (0) aggregates in Ni (naph) _2-Bd-Al (i-Bu) _2 (OPh) and Ni (naph) _2-Bd-Al (i-Bu) _2 (OPhCH_3) Magnetic, while other systems are paramagnetic.