Tungsten hexachloride metathesis
Filed: August 13, Date of Patent: July 12, Assignee: Ashland Oil, Inc. Inventor: William R. Olefin metathesis catalysts and process utilizing same. Abstract: Improved homogeneous metathesis catalysts are obtained by the use of a nitrogenous modifying agent with a tungsten compound and organotin compound.
Tungsten Hexachloride Metathesis
These modified catalyst systems used for olefin metathesis give significantly increased conversions and excellent product selectivity. Filed: November 22, Date of Patent: March 7, Ring-opening polymerization of cycloolefins by tungsten VI chloride—acetylene catalyst systems.
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Journal of Molecular Catalysis , 76 , New dinitrosylmolybdenum catalytic systems for olefin metathesis. Journal of Molecular Catalysis , 64 2 , Thomas J. Investigations of polymerisation and metathesis reactions. Journal of Molecular Catalysis , 46 , Unsymmetrisch substituierte Alkinkomplexe von Wolfram IV. Journal of Organometallic Chemistry , 2 , Karin Weiss, Rainer Goller.
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Investigation of polymerization and metathesis reactions. Journal of Molecular Catalysis , 36 , Stelzer, J. Brunthaler, G. Leising, K.
Synthesis and polymerization of tricyclo[4. Penny A Chaloner. Alkene metathesis.
Makovetskii, L. Red'kina, T. Polymerization of cyclopentene by the WCl6-phenylacetylene system activated by oxygen-containing compounds.
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Thoi Huu Ho, Thomas J. Polymerization of functionalized acetylenes. Journal of Molecular Catalysis , 28 , Louis S. No solvent was used. The total reaction time was 40 hours. A long reaction time was used due to the ineffective refluxing of the monomer that prevented it from being in constant contact with catalyst.
The following results revealed that polyoctenamer was produced: A large volume of toluene, approximately ml, was vacuum transferred into the reaction vessel, and the reaction temperature was increased from 25C to 50C. Two more additions of catalyst 2 were made fifteen hours apart, and the reaction was exposed to continuous vacuum for 40 hours.
A new self-healing epoxy with tungsten (VI) chloride catalyst
In order to compare Reaction 3 with previous reactions, a long reaction time was employed. Oligomeric polyoctenamer was produced as indicated by the following results: The minimum amount of solvent that would facilitate magnetic agitation, and its effect on the reaction was tested. Approximately 2 ml of monomer was used and 3 additions of catalyst 2 were made; one at the start of the reaction and the rest as described below. The temperature was slowly raised to 50C and when the polymer solidified, 10 ml of toluene were added together with another aliquot of catalyst at C.
The reaction temperature was raised slowly to C over a period of six hours.