نتایج جستجو برای: 1 hexene polymerization
تعداد نتایج: 2777006 فیلتر نتایج به سال:
SiO2-supported silyl chromate catalyst is an important industrial catalyst for production of high grade HDPE pipe materials. The control of the short chain branch (SCB) distribution using this catalyst system is still a great challenge. In this work, ethylene and 1-hexene copolymers were synthesized using SiO2-supported silyl chromate catalyst combined with triisobutylaluminium (TIBA), triethyl...
The title compound, C(11)H(10)O(2), crystallizes with two independent mol-ecules in the asymmetric unit. In one mol-ecule, the dihedral angle between the mean planes of the C-C=C-C group of the diene unit and essentially planar cyclo-hexene ring is 51.07 (9)°, while in the other mol-ecule it is 54.49 (12)°. In the crystal structure, weak inter-molecular C-H⋯O inter-actions link the mol-ecules i...
Catalytic dehydrocoupling of primary and secondary phosphines has been achieved for the first time using an iron pre-catalyst. The reaction proceeds under mild reaction conditions and is successful with a range of diarylphosphines. A proton acceptor is not needed for the transformation to take place, but addition of 1-hexene does allow for turnover at 50 °C. The catalytic system developed also ...
In the title mol-ecule, C(14)H(16)O, the cyclo-hexene ring adopts an envelope conformation, with all substituents equatorial. Mol-ecules are linked by C-H⋯O hydrogen bonds. A C-H⋯π inter-action involving the benzene ring is also found in the crystal structure. The H atoms of both methyl groups are disordered equally over two positions.
A series of novel half-zirconocenes containing phosphine-(thio)phenolate chelating ligands of the type Cp'Zr(thf)Cl2[X-2-R(1)-4-R(2)-6-(PPh2)C6H2] (Cp' = C5Me5, 2a: X = O, R(1) = Ph, R(2) = H; 2b: X = O, R(1) = (t)Bu, R(2) = H; 2c: X = O, R(1) = R(2) = (t)Bu; 2d: X = O, R(1) = SiMe3, R(2) = H; 2e: X = S, R(1) = SiMe3, R(2) = H; Cp' = C5H5, 3b: X = O, R(1) = (t)Bu, R(2) = H; 3c: X = O, R(1) = R(...
In the title compound, C(19)H(19)ClO(4), the central fused ring and the attached cyclo-hexene ring adopt envelope conformations, while the cyclo-hexane ring adopts a chair conformation. The crystal packing is stabilized by O-H⋯O hydrogen bonds, which link the mol-ecules into a chain along the b axis. Weak C-H⋯O bonds also occur.
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