Fluorinated Bis(phenoxyketimine)titanium Complexes for the Living, Isoselective Polymerization of Propylene: Multiblock Isotactic Polypropylene Copolymers via Sequential Monomer Addition
摘要:
A series of bis(phenoxyketimine)titanium dichloride complexes were synthesized and evaluated as catalysts for living, isoselective propylene polymerization upon activation with methylaluminoxane (MAO). Catalysts bearing phenoxyketimine ligands with different substituents at the ortho and para. positions of the phenolate ring and substituents at the ketimine carbon were investigated. The identity of the ketimine substituent had the largest effect on the activity and isoselectivity of propylene polymerization. Complex 12/MAO promoted the living, isoselective polymerization of propylene ([m(4)] = 0.73, alpha = 0.94). This catalyst system was used for the synthesis of a number of block copolymers featuring isotactic polypropylene semicrystalline blocks and poly(ethylene-co-propylene) amorphous blocks. Several triblock samples with varying block lengths, a pentablock, and a heptablock copolymer were synthesized. Mechanical testing has revealed that each is elastomeric with elongations at break between similar to 790-1000%.
Polyfluoroarylcarbonimidoyl dichlorides and chlorides. A new method of obtaining such compounds from polyfluoroaromatic amines and compounds of the CCl3R-type in the presence of AlCl3
polyfluorinated amines of the benzene, diphenyl, naphthalene and pyridine series with CCl4 in the presence of AlCl3 have been Investigated. A new method is proposed for producing polyfluoroarylcarbonimidoyl dichlorides ArfNCCl2. The reaction is shown to be sufficiently general and applicable in the series of polychlorinated anilines and low-base anilines of the hydrocarbon series as well. The possibility
研究了在AlCl 3存在下苯,联苯,萘和吡啶系列的一些多氟胺与CCl 4的反应。提出了一种新的制备聚氟芳基碳亚氨基二氯化物Ar f N = CCl 2的方法。该反应显示出足够普遍,并且适用于烃系列的多氯苯胺和低碱苯胺系列。已经研究了反应中可能包含其他类型的CCl 3 R化合物和其他路易斯酸的可能性。讨论了影响反应过程的因素以及多氟芳基碳亚氨基二氯化物的形成机理。
Reactions of N-(Perfluorophenyl)carbonimidoyl Dichloride with Aromatic Acids and Their Derivatives in the Presence of AlCl3. Formation of 2-(Perfluorophenyl)isoindoline-1,3-dione and Its Derivatives
作者:T. D. Petrova、V. E. Platonov
DOI:10.1007/s11178-005-0147-5
日期:2005.2
Reactions of N-(perfluorophenyl)carbonimidoyl dichloride with benzoic acid, benzoyl chloride, ethyl benzoate, and also with phthalic acid, phthaloyl dichloride, and phthalic anhydride in the presence of AlCl3 at 170°C afford2-(perfluorophenyl)isoindoline-1,3-dione. With benzoic acid and benzoyl chloride form also 2-(perfluorophenyl)-3-[(perfluorophenyl)imino]isoindolin-1-one. In reactions with compounds of the benzene series arise also derivatives of arylimidoyl chlorides and amide type compounds containing a CONHC6F5 moiety.
Reactions ofN-pentafluorophenylcarbonimidoyl dichloride with aromatic hydrocarbons in the presence of aluminum chloride
作者:T. D. Petrova、I. V. Kolesnikova、V. I. Mamatyuk、V. P. Vetchinov、V. E. Platonov、I. Yu. Bagryanskaya、Yu. V. Gatilov
DOI:10.1007/bf00699191
日期:1993.9
onimidoyl dichloride reacts with aromatic hydrocarbons (benzene, toluene, xylenes, and mesitylene) in the presence of AlCl3 to give stableN-pentafluorophenylbenzimidoyl chlorides, which can further react with aromatic hydrocarbons to give azomethine derivatives. An increase in the number of methyl groups in the molecule of a hydrocarbon favors the reaction.
New Phenoxyketimine Titanium Complexes: Combining Isotacticity and Living Behavior in Propylene Polymerization
作者:Andrew F. Mason、Geoffrey W. Coates
DOI:10.1021/ja044268s
日期:2004.12.1
A series of titanium bis(phenoxyketimine) olefin polymerization catalysts were synthesized and screened for propylene polymerization. The phenoxyketimine ligands contain pentafluorophenyl N-aryl groups and ortho-phenol substituents of varying size. Catalysts with ortho-phenol substituents of intermediate size produce living, substantially isotactic polypropylene. The living nature of these catalyst systems is demonstrated through the synthesis of block copolymers with narrow molecular weight distributions.
Kryuchkova, E. N.; Kolesnikova, I. V.; Drizhd, L. P., Journal of Organic Chemistry USSR (English Translation), 1988, vol. 24, # 10, p. 1840 - 1844
作者:Kryuchkova, E. N.、Kolesnikova, I. V.、Drizhd, L. P.、Savelova, V. A.、Petrova, T. D.、Platonov, V. E.