This research aimed to investigate the copolymerization of ethylene and various 1-olefins. The comonomer lengths were varied from 1-hexene (1-C₆) up to 1-octadecene (1-C₁₈) in order to study the effect of comonomer chain length on the activity and properties of the polymer in the metallocene/MAO catalyst system. The results indicated that two distinct cases can be described for the effect of 1-...

Two acyclic Schiff-base ligands, bis-5,5′-(1,3-propanediyldiimino)-2,2-dimethyl-4-hexene-3-one and bis-5,5′-(1,3-ethanediyldiimino)-2,2-dimethyl-4-hexene-3-one, were used to complex homoleptic triethylaluminum and tris[bis(trimethylsilyl)amino]alu minum, respectively. The acid–base reactions proceeded in excellent yields with elimination of ethane or bis(trimethylsilyl)amine during in situ depr...

The chromium/vanadium bimetallic Phillips catalysts developed by our research group have been proved to be a promising process to produce bimodal polyethylene using a single-reactor process. The vanadium loading of CrV-1/1, CrV-1/2, and CrV-1/3 has a significant effect on the polymerization activity, product molecular weight (MW), as well as th...

The aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization. A modified catalyst containing 10 wt. % of FeCl3 dopant demonstrated the highest activity, with 32% activity increase compared to unmodified one, amon...

This work presents the results of studying behavior catalytic systems formed on basis trichlorotris-(tetrahydrofuranate)chromium(III) in presence sulfur-containing tridentate SOS-type ligands and activated by various organoaluminum compounds. In formation systems, following compounds were used: - bis-(2-methylthioethyl) ether, bis-(2-ethylthioethyl) ether bis-(2-phenylthioethyl) triethylaluminu...

In the title compound, C(28)H(27)NO(2), the oxazinone ring adopts a twist-boat conformation and the cyclo-hexene ring has a twisted envelope conformation. The crystal structure is stabilized by weak non-classical inter-molecular C-H⋯O hydrogen bonds.

In the title compound, C(12)H(13)N, two methyl-ene C atoms of the cyclo-hexene ring are disordered over two sites with occupancies of 0.591 (10) and 0.409 (10); both disorder components adopt half-chair conformations. The crystal structure is stabilized by inter-molecular N-H⋯π and C-H⋯π inter-actions.

In the title compound, C(18)H(14)O(4), the cyclo-hexene ring adopts a sofa conformation. In the crystalline state, the mol-ecules are linked into a chain by weak inter-molecular C-H⋯O hydrogen bonds.

In the title compound, C(26)H(28)O(2), the central atoms are coplanar, with the -CH(2)-CH(2)- links of the cyclo-hexene groups lying to either side of the plane and with the diall-yloxy residues twisted out of this plane [C-C-O-C torsion angles = 16.6 (3) and -13.9 (3)°]. In the crystal structure, mol-ecules are connected into chains propagating in [100] via C-H⋯π inter-actions.

In the title compound, C(15)H(11)N(3), the cyclo-hexene ring adopts a sofa conformation. An intra-molecular N-H⋯N hydrogen bond generates an S(7) ring motif. In the crystal, mol-ecules are linked by inter-molecular N-H⋯N, C-H⋯N and C-H⋯π inter-actions into a three-dimensional network.