I. I. Oleinik

Design of schiff base-like postmetallocene catalytic systems for polymerization of olefins: IV. Synthesis of 2-(aryliminomethyl)-pyrrole and 7-(aryliminomethyl)indole derivatives containing cycloalkyl substituents

Reactions of 4,6-substituted 2-cycloalkylanilines with 1H-pyrrole-2-carbaldehyde and 1H-indole-7-carbaldehyde in methanol in the presence of formic acid gave the corresponding Schiff bases which can be used as ligands for titanium and zirconium complexes.

Design of postmetallocene catalytic systems of arylimine type for olefin polymerization: XIV. Synthesis of (N-Allyloxyaryl)salicylaldimine ligands and their complexes with titanium(IV) dichloride

By reaction of salicylaldehydes with bulky substituents in the positions 3 and 5 with o-, m-, and p-allyloxyaniline hydrochlorides in the presence of triethylamine a series of the corresponding (N-aryl)-salicylaldimines was obtained, which with TiCl2(OPr-i)2 afforded complexes of titanium(IV) dichloride L2TiCl2.

Ethylene polymerization on titanium phenoxyimine complexes with different structures

The kinetics of ethylene polymerization in the presence of catalytic systems based on methylaluminoxane-activated titanium bis(phenoxyimine) complexes with different structures has been investigated in the temperature range 30–70°C. The structures of the complexes have different substituents at the imine nitrogen atom and in the phenoxy group in the ligand, which affect the activity of the system and the molecular weight of polyethylene resulting from polymerization over at least 1 h. The polymerization kinetics is most sensitive to the structure of the substituent at the imine nitrogen atom and to bulky substituents in the ortho position of the phenoxy group. The results obtained are explained. An attempt is made to classify the influence of the substituents in the ligands. Process conditions ensuring living polymerization have been found. The physicochemical properties and structural features of the polyethylenes obtained have been determined.

Design of postmetallocene Schiff base-like catalytic systems for polymerization of olefins: XI. Synthesis of Schiff bases containing cycloalkyl substituents from 2-acetyl-6-bromopyridine

Reactions of substituted cycloalkylanilines with 2-acetyl-6-bromopyridine in methanol gave a number of the corresponding Schiff bases that are promising as ligands for the synthesis of cobalt(II) and iron(II) complexes.

Design of schiff base-like postmetallocene catalytic systems for polymerization of olefins: VIII. Synthesis of N-(o-cycloalkylphenyl) 2-hydroxynaphthalene-1-carbaldehyde imines

Substituted o-cycloalkylanilines reacted with 2-hydroxynaphthalene-1-carbaldehyde in methanol in the presence of formic acid to give the corresponding Schiff bases as ligands for the synthesis of titanium(IV) complexes.

Design of postmetallocene catalytic systems of arylimine type for olefi n polymerization: XV. Synthesis of (N-Aryl)salicylaldimine ligands containing a but-3-enyloxy group and their complexes with titanium(IV) dichloride

A series of (N-aryl)salicylaldimines was synthesized by the reaction of salicylaldehydes substituted in the positions 3 and 5 by bulky tert-butyl or α-cumyl groups with hydrochlorides of o-, m-, and p-(but-3-enyloxy) aniline in the presence of triethylamine. The obtained compounds formed by the reaction with TiCl2(OPr-i)2 complexes of titanium(IV) dichloride L2TiCl2.

Self-immobilized catalysts for ethylene polymerization based on various phenoxyimine titanium halide complexes

The kinetic features of ethylene polymerization on ten methylalumoxane-activated self-immobilized bis(phenoxyimine) complexes of titanium chloride of various structure containing oxyallyl functional groups were studied. The catalytic activity of the systems was determined in the temperature range 20–60 °C under ethylene pressure 0.4 MPa. The positions and structures of the oxyallyl group and substituents in the phenoxy groups of the complexes substantially change the activity of the catalytic systems based on these complexes, the rate of the self-immobilization of the catalysts on the polymer, and molecular weights and molecular weight distributions of the obtained polyethylenes.

Design of postmetallocene catalytic systems of aryliminetype for olefins polymerization: XIII. Synthesis of tetradentate bis(2-hydroxy-1-naphthaldimine) ligands and their complexes with titanium(IV) dichloride

Reactions of 2-hydroxy-1-naphthaldehyde with 1,4-diaminobutane, 1,6-diaminohexane, 4,4′-methylenedianiline and its alkyl- and cycloalkyl-sybstituted derivatives, with 4,4′-sulfonyldianiline, 2,2′- and 4,4′-oxydianiline, 4,4′-(1,4-phenylenebisoxy)dianiline, 4,4′-[propane-2,2-diylbis(1,4-phenylenebisoxy)]dianiline, and p-terphenyl-4,4″-diamine afforded a series of the corresponding diimines that at treating with TiCl2(OPr-i)2 formed mono- and binuclear complexes of titanium(IV) dichloride with tetradentate ligands LTiCl2 and L2(TiCl2)2.

Design of Schiff base-like postmetallocene catalytic systems for polymerization of olefins: IX. Synthesis of salicylaldehydes containing an isobornyl substituent and hydroxyphenyl imine ligands based thereon

Reactions of substituted 2-(1,7,7-trimethylbicyclo[2.2.1]hept-exo-2-yl)phenols with paraformaldehyde in the presence of tin(IV) chloride and 2,6-dimethylpyridine gave the corresponding salicylaldehydes which reacted with primary amines to produce a series of new Schiff bases as ligands for complex formation with transition metals.

Design of postmetallocene catalytic systems of arylimine type for olefin polymerization: XVI. Synthesis of (N-aryl)salicylaldimines containing pent-4-enyloxy group and their complexes with titanium(IV) dichloride

Reactions of p-(pent-4-enyloxy)aniline with salicylaldehyde containing versatile substituents in the positions 3 and 5 in an open system without solvent at 130°C afforded a series of (N-aryl)salicylaldimines, which with TiCl2(OPr-i)2 formed complexes of titanium(IV) dichloride L2TiCl2.