Princeton University

Momentive Performance Materials Gmbh

Cornell University

USA As Represented by Secretary of the Navy

Chevron Phillips Chemical Company LP

Paul J Chirik

Johannes G P Delis

Kenrick M Lewis

Keith James Weller

Susan Adams Nye

Aroop Kumar Roy

Tianning Diao

Julie Boyer

Aaron M Tondreau

Renyuan Yu

C Rose Kennedy

Crisita Carmen Hojilla Atienza

Eric Raymond Pohl

Benjamin G Harvey

Richard W Cruse

Brooke L Small

Kyle E Rosenkoetter

Megan Mohadjer Beromi

Sarah Kathleen Russell

Sebastien Monfette

Cristia Carmen Hojilla Atienza

Max R Friedfeld

Jordan M Hoyt

Crista Carmen H Atienza

Crisita Carmen H Atienza

Brian A Schaefer

Margaret Scheuermann

Jennifer Obligacion

Scott Semproni

Christopher Schuster

Sarah Tondreau

Johannes GP Delis

Julie L Boyer

Methods of polymer and/or oligomer depolymerization are described herein which, in some embodiments, enable facile polymer and/or oligomer decomposition under mild, non-energy intensive conditions. Briefly, a method of depolymerization comprises providing a reaction mixture comprising a transition metal catalyst, and a polymer or oligomer having a backbone including cyclobutane units, and decomposing the polymer or oligomer to provide diene monomer or alkene monomer.

Depolymerization of oligomers and polymers comprising cyclobutane units

Disclosed herein is the use of manganese, iron, cobalt, or nickel complexes containing tridentate pyridine di-imine ligands as hydrosilylation catalysts. These complexes are effective for efficiently catalyzing hydrosilylation reactions, as well as offering improved selectivity and yield over existing catalyst systems.

Non-precious metal-based hyrdosilylation catalysts exhibiting improved selectivity

In one aspect, oligomeric and polymeric species are described herein exhibiting new architectures and associated properties. In some embodiments, such species are synthesized by oligomerization or polymerization of diene monomer via cycloaddition in the presence of a transition metal complex. Oligomers described herein, for example, comprise cyclobutane units in the oligomer backbone. Similarly, a polymers described herein comprise cyclobutane units in the polymer backbone.

Oligomeric and polymeric species comprising cyclobutane units

A method for making a fuel includes reacting a conjugated diene or a mixture of conjugated dienes with a catalyst selected from the group consisting of a low valent iron catalyst stabilized with a pyridineimine ligand, an iron precatalyst coordinated to the pyridineimine ligand that is activated with a reducing agent, a low oxidation state Fe complex stabilized with a pyridineimine ligand and a coordinating ligand, and combinations thereof, thereby forming a substituted cyclooctadiene. The substituted cyclooctadiene is then hydrogenated, thereby forming cyclooctane fuel.

Producing cyclic fuels from conjugated diene

A process for producing a silylated product comprises reacting a mixture comprising (a) an unsaturated compound containing at least one unsaturated functional group, (b) a silyl hydride containing at least one silylhydride functional group, and (c) a catalyst, optionally in the presence of a solvent, to produce a dehydrogenative silylated product, a hydrosilylated product, or a combination of a dehydrogenative silylated product and a hydrosilylated product, wherein the catalyst is chosen from a pyridine diimine cobalt dicarboxylate complex or a cobalt carboxylate compound, and the process is conducted without pre-activating the catalyst via a reducing agent and/or without an initiator or promoter compound. The present catalysts have been found to be active in the presence of the silyl hydride employed in the silylation reaction.

Dehydrogenative silylation, hydrosilylation and crosslinking using pyridinediimine cobalt carboxylate catalysts

In one aspect, cobalt complexes are described herein. In some embodiments, such cobalt complexes employ bis(phosphine) or bis(imine) ligand and are operable as catalysts for borylation of arenes and aromatic heterocycles.

Base metal catalyzed borylation of arenes and aromatic heterocycles

In one aspect, cobalt complexes are described herein. In some embodiments, such cobalt complexes are operable as catalysts for hydroboration and borylation applications.

Hydroboration and borylation with cobalt catalysts

A process comprising contacting a) an alkene, b) a hydrogen-boron bond containing compound, c) an &#x3b1;-diimine metal salt complex comprising an &#x3b1;-diimine iron salt complex or an &#x3b1;-diimine cobalt salt complex, and d) a groupmetal borohydride under conditions suitable to form an alkylboron compound. A process comprising contacting a) an alkene, b) a hydrogen-boron bond containing compound, and c) an &#x3b1;-diimine metal salt complex comprising an &#x3b1;-diimine iron methylenetrihydrocarbylsilyl complex or an &#x3b1;-diimine cobalt methylenetrihydrocarbylsilyl complex, to form an alkyl-boron compound under conditions suitable to form an alkylboron compound. A process comprising contacting an alkene, a hydrogen-boron bond containing compound, and an &#x3b1;-diimine metal salt complex to form an alkyl-boron compound under conditions suitable to form an alkylboron compound.

Olefin hydroboration

The present invention is directed to a selective and efficient process for the hydrosilylation of compounds containing terminally unsaturated 1,3-dienes using iron-based hydrosilylation catalysts. The resulting 1,2-addition products are useful as precursors for various silicone materials or silane- or silyl/silicone-functionalized polyolefins.

Selective 1,2-hydrosilylation of terminally unsaturated 1,3-dienes using iron catalysts

Disclosed herein are cobalt complexes containing terdentate pyridine di-imine ligands and their use as efficient, reusable, and selective dehydrogenative silylation, crosslinking, and tandem dehydrogenative silylation-hydrogenation catalysts.

Reusable homogeneous cobalt pyridine diimine catalysts for dehydrogenative silylation and tandem dehydrogenative-silylation-hydrogenation

A transition metal-containing compound having a tridentate chiral ligand bound to iron, cobalt, or nickel. The tridentate ligands are bound to the metal via nitrogen, phosphorus, and/or arsenic atoms. The tridentate ligand has a chiral group bound at least one of the nitrogen, phosphorus, and arsenic atoms, and a blocking group may be bound to another one of the nitrogen, phosphorus, and arsenic atoms. The transition metal-containing compound is useful for the catalyzing the asymmetric hydrogenation of olefins.

Enantiopure base-metal catalysts for asymmetric catalysis and bis(imino)pyridine iron alkyl complexes for catalysis

Disclosed herein are cobalt complexes containing pyridine di-imine ligands and chelating alkenyl-modified silyl ligands, and their use as hydrosilylation and/or dehydrogenative silylation and crosslinking catalysts. The cobalt complexes also exhibit adequate air stability for handling and manipulation.

Cobalt catalysts and their use for hydrosilylation and dehydrogenative silylation

Disclosed herein are cobalt complexes containing terpyridine ligands and chelating alkene-modified silyl ligands, and their use as hydrosilylation and/or dehydrogenative silylation and crosslinking catalysts. The cobalt complexes also exhibit adequate air stability for handling and manipulation.

Disclosed herein are cobalt terpyridine complexes containing a single ligand coordinated to the cobalt, and their use as hydrosilylation and/or dehydrogenative silylation and crosslinking catalysts. The cobalt complexes also exhibit adequate air stability for handling and manipulation.

Growing community of inventors

Ithaca, NY, United States of America

Paul J Chirik