Understanding the Insertion Pathways and Chain Walking Mechanisms of α-Diimine Nickel Catalysts for α-Olefin Polymerization: A 13C NMR Spectroscopic Investigation

2017 ◽  
Vol 50 (18) ◽  
pp. 7010-7027 ◽  
Author(s):  
Kyle S. O’Connor ◽  
Jessica R. Lamb ◽  
Tulaza Vaidya ◽  
Ivan Keresztes ◽  
Kristine Klimovica ◽  
...  
Keyword(s):  
13C Nmr ◽  
Spectroscopic Investigation ◽  
Olefin Polymerization ◽  
Nickel Catalysts ◽  
Chain Walking

Synthesis of polyolefin elastomers from unsymmetrical α-diimine nickel catalyzed olefin polymerization

2018 ◽  
Vol 9 (30) ◽  
pp. 4143-4149 ◽  
Author(s):  
Jun Fang ◽  
Xuelin Sui ◽  
Yougui Li ◽  
Changle Chen
Keyword(s):  
Olefin Polymerization ◽  
Nickel Catalysts ◽  
Chain Walking

Due to a unique chain walking process, α-diimine nickel catalysts produce variously branched polyolefins using only ethylene as the feedstock.

scholarly journals Characterization and biological evaluation of some novel pyrazolo[3',4':4,5]thieno[2,3-d]pyrimidin-8-ones synthesized via the Gewald reaction

2008 ◽  
Vol 73 (7) ◽  
pp. 683-690 ◽  
Author(s):  
Dipti Dodiya ◽  
Amit Trivedi ◽  
Samir Jarsania ◽  
Shailesh Vaghasia ◽  
Viresh Shah
Keyword(s):  
Antimicrobial Activity ◽  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Spectroscopic Investigation ◽  
Aromatic Aldehydes ◽  
Biological Evaluation ◽  
Bacterial Strains ◽  
Gewald Reaction ◽  
Compound Ii

The synthesis of substituted pyrazolo[3',4':4,5]thieno[2,3-d]pyrimidin-8-ones (IIIa-j) from 5-amino-3-methyl-1H-thieno[3,2-c]pyrazole-6-carbonitrile (II) is described. The key compound II was synthesized from (5-methyl- -2,4-dihydro-3H-pyrazol-3-ylidene)malononitrile I via the Gewald reaction. The synthesis of the title compounds IIIa-j was accomplished by condensation of II with different aromatic aldehydes. The newly synthesized heterocyles were characterized by elemental analysis, IR, 1H-NMR, 13C-NMR and mass spectroscopic investigation. All the newly synthesized compounds were evaluated for antimicrobial activity against a variety of bacterial strains. .

Study on 2-thiophenecarbonyl chloride-quenched olefin polymerization with α-diimine nickel catalysts

2018 ◽  
Vol 27 (3) ◽  
pp. 153-159 ◽  
Author(s):  
Yintian Guo ◽  
Pengjia Yang ◽  
Shuangjie Zhang ◽  
Baiyu Jiang ◽  
Akbar Khan ◽  
...  
Keyword(s):  
Olefin Polymerization ◽  
Nickel Catalysts

scholarly journals Palladium and Nickel Catalyzed Chain Walking Olefin Polymerization and Copolymerization

ACS Catalysis ◽  
2015 ◽  
Vol 6 (1) ◽  
pp. 428-441 ◽  
Author(s):  
Lihua Guo ◽  
Shengyu Dai ◽  
Xuelin Sui ◽  
Changle Chen
Keyword(s):  
Olefin Polymerization ◽  
Chain Walking

Titanocene-Methylaluminoxane Catalysts for Olefin Polymerization: A 13C NMR Study of the Reaction Equilibria and Polymerization

1995 ◽  
Vol 28 (15) ◽  
pp. 5358-5362 ◽  
Author(s):  
Incoronata Tritto ◽  
San Xi Li ◽  
Maria Carmela Sacchi ◽  
Paolo Locatelli ◽  
Giulio Zannoni
Keyword(s):  
13C Nmr ◽  
Olefin Polymerization ◽  
Nmr Study

Ethylene–4-methyl-1-pentene copolymers of complex chain architecture using α-diimine Ni(ii) catalysts: synthesis, 13C NMR assignment and understanding the chain-walking mechanism

2014 ◽  
Vol 5 (6) ◽  
pp. 2065 ◽  
Author(s):  
Simona Losio ◽  
Giuseppe Leone ◽  
Fabio Bertini ◽  
Giovanni Ricci ◽  
Maria Carmela Sacchi ◽  
...  
Keyword(s):  
13C Nmr ◽  
Nmr Assignment ◽  
Complex Chain ◽  
Chain Architecture ◽  
Walking Mechanism ◽  
Chain Walking
Sign in / Sign up

Export Citation Format

Share Document