The title compound, C(23)H(23)BrO(4), is an inter-mediate in the synthesis of fused heterocycles. In the title mol-ecule, the cyclo-hexene ring has a distorted half-chair conformation. The bromo-phenyl ring and the mean plane of the cyclo-hexene ring form a dihedral angle of 13.8 (3)°, whereas the benzene and cyclo-hexene rings are approximately perpendicular [88.44 (17)°]. There are only weak ...

Coordinative chain transfer polymerization (CCTP) has opened a new path for the development of novel products like olefin block copolymers and chain-end functional polyolefins. However, conflicting results are frequently reported on the catalyst performance including activity and comonomer selectivity under CCTP conditions. Here we have selected two catalysts including rac-ethylenebis(1-η5-inde...

Data were obtained on the copolymerization of ethylene with α-olefins over supported titanium–magnesium catalysts (TMC) prepared same magnesium dichloride support but differing in composition and oxidation state titanium. The kinetics 1-hexene TMC different compositions studied. produced ethylene–1-hexene copolymers, their molecular weight distribution, thermophysical characteristics, branching...

The title compound, C(11)H(16)Cl(4), was synthesized by the reaction of (1S)-β-pinene with triethyl-amine in the presence of ZnCl(2). The cyclo-hexene ring assumes a half-boat conformation. The crystal packing is governed only by van der Waals inter-actions. The structure, which has been refined in P2(1), presents a striking P2(1)/m pseudosymmetry.

The asymmetric unit of the title compound, C(17)H(15)NO(4), contains two independent mol-ecules with similar geometric parameters. In both mol-ecules, the conformation of the cyclo-hexene ring is half-chair, while the pyrrolidinone ring adopts an envelope conformation with the γ-carbon atom of the α-pyrrolidinone ring as the flap. In the crystal, O-H⋯O hydrogen bonds between the carb-oxylic and...

The reactions of Ar'GaGaAr' (Ar' = C(6)H(3)-2,6-(C(6)H(3)-2,6-(i)Pr(2))(2)) with alkenes revealed the addition of two olefins per Ar'GaGaAr' under ambient conditions for ethylene, propene, 1-hexene and styrene but no reactions with more hindered or cyclic olefins.

The title compound, C(21)H(19)BrN(2)OS, exists in a cis conformation with respect to the N=C bond [1.2602 (14) Å]. The cyclo-hexene ring adopts a distorted half-chair conformation and the C-N bond lies in an equatorial orientation. The thia-zolidine ring forms dihedral angles of 53.76 (7) and 57.22 (7)° with the benzene and bromo-substituted benzene rings, respectively. The dihedral angle betwe...

Computations involving the cyclization of the 5-hexenyl radical to produce methylcyclopentane (81%), 1-hexene (17%), and cyclohexane (2%) as a result, proved that the reaction is kinetically rather than thermodynamically controlled. Specifically the stereoelectronic requirement of the addition of the radical center to the alkene in the transition state is the underlying factor of the difference...

In the title compound, C(17)H(19)NO(5), the cyclo-hexene ring is in a half-chair conformation and the isoxazole ring in an envelope conformation with the N atom as the flap. The C atoms in the 4- and 6-positions are of the same absolute configuration, whereas the C atom in the 5-position is of the opposite configuration, i.e. (4S*,5R*,6S*). The methyl fragment of the eth-oxy-carbonyl group at p...