2,2′-Bis(2-indenyl) biphenyl is an organic compound with the formula
6H4C9H7sub>2. The compound is the precursor, upon deprotonation, to ansa-metallocene complexes within the area of
transition metal indenyl complexes.
Metals studied with 2,2′-bis(2-indenyl) biphenyl include
titanium
Titanium is a chemical element with the symbol Ti and atomic number 22. Found in nature only as an oxide, it can be reduced to produce a lustrous transition metal with a silver color, low density, and high strength, resistant to corrosion in ...
,
zirconium
Zirconium is a chemical element with the symbol Zr and atomic number 40. The name ''zirconium'' is taken from the name of the mineral zircon, the most important source of zirconium. The word is related to Persian '' zargun'' (zircon; ''zar-gun'', ...
, and
hafnium
Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Its existence was predicted by Dmitri M ...
. The ligand and its complexes have been prepared by the research group of the late
Brice Bosnich
Brice Michael Bosnich (3 June 1936 – 13 April 2015) was an Australian inorganic chemist. He gained recognition for the design of complex ligands useful in homogeneous catalysis.
Education
He graduated from University of Sydney with a Bachelo ...
at
The University of Chicago
The University of Chicago (UChicago, Chicago, U of C, or UChi) is a private research university in Chicago, Illinois. Its main campus is located in Chicago's Hyde Park neighborhood. The University of Chicago is consistently ranked among the be ...
. Zirconium and hafnium complexes made from this ligand were found to be active catalysts for the polymerization of the smallest
alkenes
In organic chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond.
Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds.H. Stephen Stoker (2015): General, Organic, an ...
– compounds with carbon-carbon double bonds—namely,
ethylene
Ethylene (IUPAC name: ethene) is a hydrocarbon which has the formula or . It is a colourless, flammable gas with a faint "sweet and musky" odour when pure. It is the simplest alkene (a hydrocarbon with carbon-carbon double bonds).
Ethylene i ...
and
propylene
Propylene, also known as propene, is an unsaturated organic compound with the chemical formula CH3CH=CH2. It has one double bond, and is the second simplest member of the alkene class of hydrocarbons. It is a colorless gas with a faint petrole ...
. The use of such complexes in the
polymerization
In polymer chemistry, polymerization (American English), or polymerisation (British English), is a process of reacting monomer, monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. There are ...
of
alkenes
In organic chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond.
Alkene is often used as synonym of olefin, that is, any hydrocarbon containing one or more double bonds.H. Stephen Stoker (2015): General, Organic, an ...
has since been reported, and patented by
DSM Research.
References
{{DEFAULTSORT:Bis(2-indenyl) biphenyl, 2,2'
Ligands
Catalysts
Hydrocarbons