Ph3CB(C6F5)4的分子量是多少呢?根据化学式,我们可以计算出它的相对分子质量为1097.39 g/mol。这意味着每个Ph3CB(C6F5)4分子的质量为1097.39克,相对于比较常见的有机分子而言,它的分子量比较大。 为什么Ph3CB(C6F5)4的分子量如此重要?首先,它是一种非常有用的化合物,可以用于催化许多有机合成反应。其次,作为...
Highly Isospecific Polymerization of Pro-pylene with Bis(Phenoxy-Imine)Zr and Hf Complexes UsingiBu3Al/Ph3CB(C6F5)4as a Cocatalyst. Prasad A V,Makio H. Chemistry Letters . 2004Prasad A V,Makio H.Highly Isospecific Polymerization of Pro-pylene with Bis(Phenoxy-Imine)Zr and Hf Complexes ...
Polymerization of 1-hexene with Bis[N-(3-tert-butylsalicylidene)phenylaminato] Titanium(Ⅳ) Dichloride Using i Bu3Al/Ph3CB(C6F5)4 as a Cocatalyst[J].Macromolecular Rapid Communications,2000,(18):1333-1336.doi:10.1002/1521-3927(20001201)21:18<1333::AID-MARC1333>3.0.CO;2-V....
Polymerization of propylene was conducted at 0 ∼ 150°C with the [ArN(CH2)3NAr]TiCl2 (Ar = 2,6-iPr2C6H3) complex using a mixture of trialkylaluminium (AIR3, R = methyl, ethyl and isobutyl) and Ph3CB(C6F5)4 as cocatalyst. When AlMe3 or AlEt3 was employed, atactic polypropyle...
(4)动物体内的酶最适pH大多在6.5～8.0之间,但胃蛋白酶的最适pH例外,为1.5～2;植物体内酶的最适pH大多在4.5～6.5之间.因此,图乙可表示胃蛋白酶催化反应的速率变化曲线.故答案为:(1)底物充足,酶已饱和 (2)底物浓度 温度、PH等(3)最适PH 不变 (4)B 点评:本题结合曲线图,考查影响酶促反应速率的因素,...
Naofumi NagaElsevier B.V.Journal of Molecular Catalysis A ChemicalNaga N.Styrene polymerization with half-sandwiched titanocene trichloride catalysts combined with alkylaluminum-Ph3CB(C6F5)4 cocatalyst systems. Journal of Molecular Catalysis A Chemical . 2007...
Highly Isospecific Polymerization of Pro-pylene with Bis(Phenoxy-Imine)Zr and Hf Complexes UsingiBu3Al/Ph3CB(C6F5)4as a Cocatalyst. Prasad A V,Makio H. Chemistry Letters . 2004Prasad A V,Makio H.Highly Isospecific Polymerization of Pro-pylene with Bis(Phenoxy-Imine)Zr and Hf Complexes ...
Polymerization of propylene was conducted at 0 ∼ 150°C with the [ArN(CH2)3NAr]TiCl2 (Ar = 2,6-iPr2C6H3) complex using a mixture of trialkylaluminium (AIR3, R = methyl, ethyl and isobutyl) and Ph3CB(C6F5)4 as cocatalyst. When AlMe3 or AlEt3 was employed...
Zhang,,Y. Mu."Homo-and copolymerization of5-ethylidene-2-norbornene with ethylene by [2-C5Me4-4,6tBu2C6H2O]TiCl2/AliBu3/Ph3CB(C6F5)4catalyst system and epoxidation of the resulting copolymer".Polymer. 2008Li HC,Li J C,Mu Y.Homo-and copolymerization of 5-ethylidene-2-norbornene with ...
3NAr]TiCl2 (Ar = 2,6-iPr2C6H3) complex using a mixture of trialkylaluminium (AIR3, R = methyl, ethyl and isobutyl) and Ph3CB(C6F5)4 as cocatalyst. When AlMe3 or AlEt3 was employed, atactic polypropylene (PP) was selectively produced, whereas the use of Al(iBu)3 gave...