Abstract:
The disclosure provides a procatalyst for the polymerization of ethylene and optionally one or more alpha-olefins having the structure shown in formula (I) below: wherein at least two of Y 1 -Y 3 and at least two of Y 4 -Y 6 are fluorine atoms and when only two of Y 1 - Y 3 and only two of Y 4 -Y 6 are fluorine atoms, the non-fluorine Y 1 -Y 6 are selected from the group consisting of H atom, alkyl groups, aryl groups, heteroaryl groups, and alkoxy groups. Also provided is a polymerization process using the procatalyst.
Abstract:
A process for preparing one or more carbazoles comprising (a) contacting one or more compounds represented by formula (1) below with diboron reagents in the presence of PdCl2(dppf) to form one or more 2,2'-dichlorobiaryl represented by formula (2) below; and (b) contacting the one or more 2,2'-dichlorobiaryls with one or more H2N-Y compounds, in the presence of one or more palladium containing catalytic components; thereby forming one or more carbazoles represented by formula (3) below is provided.
Abstract:
The present disclosure describes a method of coupling a first aromatic compound to a second aromatic compound, the method comprising: (a) preparing a reaction mixture comprising the first aromatic compound, the second aromatic compound, a catalyst and water; the reaction mixture does not contain an external base, the reaction mixture having an initial pH of from 11 to 1; the catalyst having at least one group 10 atom; the first aromatic compound having a halogen, triflate or sulfonate substituent; the second aromatic compound having a boron-containing substituent; wherein, at least one of the first aromatic compound or the second aromatic compound includes one or more heteroatom; and (b) reacting the first aromatic compound and the second aromatic compound in the reaction mixture, the reaction mixture having a final pH following reaction of the first aromatic compound and the second aromatic compound.
Abstract:
Embodiments are directed to a metal-ligand complex of formula (I). In addition, a polymerization process includes polymerizing at least one olefin in the presence of a catalyst system comprising the metal-ligand complex and at least one activator to produce an olefinic polymer.