Abstract:
A process is provided for preparing nickel ylides which are themselves novel compounds defined by the following Formula I: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are either alike or different members selected from the group consisiting of hydrogen, alkyl radicals having from about one to about 24 carbon atoms, preferably from about one to about 10 carbon atoms; aryl radicals having from about six to about 20 carbon atoms, preferably from about six to about 10 carbon atoms; alkenyl radicals having from about two to about 30 carbon atoms, preferably from about two to about 20 carbon atoms; cycloalkyl radicals having from about three to about 40 carbon atoms, preferably from about three to about 30 carbon atoms; aralkyl and alkaryl radicals having from about six to about 40 carbon atoms, preferably from about six to about 30 carbon atoms; a halogen radical selected from the group consisting of fluorine, chlorine, bromine and iodine, preferably chlorine; a hydroxyl group; an alkoxy or aryloxy group; a hydrocarbyl group, such as defined above, carrying halogen, hydroxyl or alkoxy or aryloxy; and a sulfonato group (--SO.sub.3 .sup.-) or an alkyl, aryl, alkenyl, cycloalkyl, aralkyl or alkaryl group carrying a sulfonato group; provided that at least one of R.sub.1, R.sub.2 and R.sub.3 is a sulfonato group or an alkyl, aryl, alkenyl, cycloalkyl, aralkyl or alkaryl, as defined above, carrying a sulfonato group; M is sulfur or oxygen, preferably oxygen; E is phosphorus, arsenic, antimony or nitrogen, preferably phosphorus; and F is phosphorus, arsenic or antimony, preferably phosphorus. The process comprises reacting a ligand defined by the following formula: ##STR2## with an alpha-substituted ketone or aldehyde or an alpha-substituted thioketone or thioaldehyde defined by the following formula: ##STR3## to obtain the metal salt defined by the following Formula II: ##STR4## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.7, R.sub.8, F and M are as defined above and X is a halogen radical selected from the group consisting of fluorine, chlorine, bromine and iodine, preferably chlorine and bromine, a tosyl group (a tolune sulfonate group), or an acetate group. This metal salt is reacted with a base to obtain the novel ylide defined by the following Formula III: ##STR5## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.7, R.sub.8, F and M are as defined above. This ylide is then reacted with (1) a zero valent nickel compound or any nickel compound convertible to a zero valent nickel compound in situ and (2) a ligand having the formula: ##STR6## wherein R.sub.4, R.sub.5, R.sub.6 and E are as defined above.
Abstract:
The invention relates to a block copolymer comprising a first block of general structure formula (II) and a second block of general structure formula (III) wherein Rx is an organic group having a chain length of from 1-9 atoms; Ry is an organic group having a chain length of from 10-38 atoms; n1 is at least 2; n2 is at least 2. The invention further relates to a method for preparing such block copolymer using as a catalyst a phenoxy-imine based catalyst having general structure of formula I.
Abstract:
The invention describes a nickel-based composition. The invention also concerns the use of said composition as a catalytic composition in an olefin oligomerization process.
Abstract:
A composition is capable of curing via condensation reaction. The composition uses a new condensation reaction catalyst. The new condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, rubber, or resin.
Abstract:
A composition is capable of curing via condensation reaction. The composition uses a new condensation reaction catalyst. The new condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, rubber, or resin.
Abstract:
A composition is capable of curing via condensation reaction. The composition uses a new condensation reaction catalyst. The new condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, rubber, or resin.
Abstract:
A composition is capable of curing via condensation reaction. The composition uses a new condensation reaction catalyst. The new condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, rubber, or resin.
Abstract:
The present invention discloses new organic compounds (e.g., ligands), their metal complexes and compositions using those compounds. The invention also relates to the field of catalysis. In particular, this invention relates to new compounds which when combined with suitable metals or metal precursor compounds provide useful catalysts for various bond-forming reactions, including Suzuki cross-coupling reactions. The invention also relates to performing Suzuki cross coupling reactions with unreactive aryl-chlorides.
Abstract:
A process for oligomerizing ethylene using a nickel ylide catalyst substituted with a sulfonato group, wherein the oligomerization is carried out in the presence of methanol and water.
Abstract:
Ammonium hydroxide is used to remove nickel ylide residue from an oligomerization reaction product obtained by contacting ethylene with a nickel ylide catalyst under oligomerization conditions. The oligomerization reaction product is contacted with ammonium hydroxide to obtain a product composed of two layers, an upper layer containing normal alpha olefins and a lower layer containing nickel ylide residue. The two layers are then separated from each other to recover the desired normal alpha olefins.