Influence of imine‐ carbon substituent in 6‐bromo‐2‐iminopyridine‐based cobalt(II) complexes on 1,3‐butadiene polymerization

2019 ◽  
Vol 68 (8) ◽  
pp. 1484-1491 ◽  
Author(s):  
Feng Wang ◽  
Heng Liu ◽  
Yanming Hu ◽  
Xuequan Zhang
Keyword(s):  
Butadiene Polymerization

Pyridine–oxazoline and quinoline–oxazoline ligated cobalt complexes: Synthesis, characterization, and 1,3-butadiene polymerization behaviors

2015 ◽  
Vol 435 ◽  
pp. 305-312 ◽  
Author(s):  
Jun Guo ◽  
Heng Liu ◽  
Jifu Bi ◽  
Chunyu Zhang ◽  
Hexin Zhang ◽  
...  
Keyword(s):  
Cobalt Complexes ◽  
Butadiene Polymerization

Butadiene polymerization over a π-allylnickel-alumina-silica gel catalyst system

1980 ◽  
Vol 13 (4) ◽  
pp. 319-322 ◽  
Author(s):  
W. Skupiński ◽  
M. Zawartke ◽  
St. Malinowski
Keyword(s):  
Silica Gel ◽  
Catalyst System ◽  
Butadiene Polymerization

1,3-butadiene polymerization using Co/Nd-based Ziegler/Natta catalyst: Microstructures and properties of butadiene rubber

2014 ◽  
Vol 55 (1) ◽  
pp. 14-21 ◽  
Author(s):  
Chansuree Chatarsa ◽  
Pattarapan Prasassarakich ◽  
Garry L. Rempel ◽  
Napida Hinchiranan
Keyword(s):  
Butadiene Rubber ◽  
Natta Catalyst ◽  
Butadiene Polymerization ◽  
Ziegler Natta Catalyst

Isomorphous rare-earth tris[bis(2,6-diisopropylphenyl) phosphate] complexes and their catalytic properties in 1,3-diene polymerization and in the inhibited oxidation of polydimethylsiloxane

2018 ◽  
Vol 74 (5) ◽  
pp. 590-598 ◽  
Author(s):  
Mikhail E. Minyaev ◽  
Alexander N. Tavtorkin ◽  
Sof'ya A. Korchagina ◽  
Galina N. Bondarenko ◽  
Andrei V. Churakov ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Catalytic Properties ◽  
Molar Ratio ◽  
High Catalytic Activity ◽  
Catalytic Systems ◽  
Neodymium Complex ◽  
Butadiene Polymerization ◽  
Bond Network ◽  
Phosphate Ligands ◽  
Monodentate Coordination

Crystals of mononuclear tris[bis(2,6-diisopropylphenyl) phosphato-κO]pentakis(methanol-κO)lanthanide methanol monosolvates of lanthanum, [La(C24H34O4P)3(CH3OH)5]·CH3OH, (1), cerium, [Ce(C24H34O4P)3(CH3OH)5]·CH3OH, (2), and neodymium, [Nd(C24H34O4P)3(CH3OH)5]·CH3OH, (3), have been obtained by reactions between LnCl3(H2O) n (n = 6 or 7) and lithium bis(2,6-diisopropylphenyl) phosphate in a 1:3 molar ratio in methanol media. Compounds (1)–(3) crystallize in the monoclinic P21/c space group and have isomorphous crystal structures. All three bis(2,6-diisopropylphenyl) phosphate ligands display a κO-monodentate coordination mode. The coordination number of the metal atom is 8. Each [Ln{O2P(O-2,6-iPr2C6H3)2}3(CH3OH)5] molecular unit exhibits four intramolecular O—H...O hydrogen bonds, forming six-membered rings. The unit forms two intermolecular O—H...O hydrogen bonds with one noncoordinating methanol molecule. All six hydroxy H atoms are involved in hydrogen bonding within the [Ln{O2P(O-2,6-iPr2C6H3)2}3(CH3OH)5]·CH3OH unit. This, along with the high steric hindrance induced by the three bulky diaryl phosphate ligands, prevents the formation of a hydrogen-bond network. Complexes (1)–(3) exhibit disorder of two of the isopropyl groups of the phosphate ligands. The cerium compound (2) demonstrates an essential catalytic inhibition in the thermal decomposition of polydimethylsiloxane in air at 573 K. Catalytic systems based on the neodymium complex tris[bis(2,6-diisopropylphenyl) phosphato-κO]neodymium, (3′), which was obtained as a dry powder of (3) upon removal of methanol, display a high catalytic activity in isoprene and butadiene polymerization.

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