ChemInform Abstract: Bis(alkynyl) Transition Metal Complexes, R1CC-[M]-CCR2, as Organometallic Chelating Ligands; Formation of μ,η1(2)-Alkynyl-Bridged Binuclear and Oligonuclear Complexes

ChemInform ◽  
2000 ◽  
Vol 31 (51) ◽  
pp. no-no
Author(s):  
Heinrich Lang ◽  
Darren S. A. George ◽  
Gerd Rheinwald
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Chelating Ligands

Transition metal complexes bearing tridentate ligands for precise olefin polymerization

2016 ◽  
Vol 7 (15) ◽  
pp. 2601-2634 ◽  
Author(s):  
Deqian Peng ◽  
Xinwen Yan ◽  
Chao Yu ◽  
Shaowen Zhang ◽  
Xiaofang Li
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Olefin Polymerization ◽  
Chelating Ligands ◽  
Tridentate Ligands

This review covers key developments in the design of post-metallocene transition metal complexes (precatalysts) bearing tridentate chelating ligands and their application in olefin polymerization.

scholarly journals 2,5-Dimethyl-3,6-bis[(2,6-diisopropylphenylimino)methyl]- and 2,6-Bis[(2,6-diisopropylphenylimino)methyl]pyrazine: Two New Chelating Ligands for Transition Metal Complexes

2005 ◽  
Vol 60 (1) ◽  
pp. 22-24 ◽  
Author(s):  
Herbert Schumann ◽  
He-Kuan Luo
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Chelating Ligands ◽  
Methyl Benzene

The reaction of tetramethylpyrazine with SeO2 yields 2,5-dimethylpyrazine-3,6-dicarboxaldehyde (1) from which the 2,5-dimethyl-3,6-bis[(2,6-diisopropylphenylimino)methyl]pyrazine (2) was synthesized by treatment with 2 equivalents of 2,6-diisopropylaniline. 2,6-Dimethylpyrazine reacts with benzaldehyde to give 2,6-distyrylpyrazine (3). Ozonolysis of 3, followed by treatment with Na2SO3 and 2,6-diisopropylaniline resulted in the formation of 2,6-bis[(2,6-diisopropylphenylimino) methyl]pyrazine (5) together with [(2,6-diisopropylphenylimino)methyl]benzene (6).

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